StackRadar

CVE-2026-56866

High

Advisory

Published 8 Oct 2026In the index since 9 Oct 2026
Severity
High
worst across findings
CVSS
7.5
base score, highest
EPSS
0.003
22nd percentile
CISA KEV
Not listed
no confirmed exploitation
Charts affected
5,295
of 18,117 indexed, latest versions
Container images
6,105
deployed by those charts
Fix available
1 of 2
affected packages

HTTP/1 client connection desynchronization after CONNECT rejection in net/http

Carried by container images the latest versions of 5,295 of 18,117 indexed charts deploy, on 6,105 images.

Affected packageAffected versionsFixed inImages
stdlibgolanggo1.13, go1.13.1, go1.13.3, go1.13.4+212 more1.26.96,105
golang-1.19deb1.19.8-2no fix listed1
OSV records
DEBIAN-CVE-2026-56866GO-2026-6605
Trending
Rank 9 in indexed charts, since 9 Oct 2026. See the ranking →

Charts affected

5,295 by stars
ChartLatestAffected imagesRadar Score
prometheus-nginx-exporterprometheus-communityVerified publisher1.23.11 of 1See more

prometheus-nginx-exporter prometheus-community 1.23.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
nginx/nginx-prometheus-exporter:1.5.385666e7fde7e
stdlib@go1.26.6
1.26.9

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250
prometheus-smartctl-exporterprometheus-communityVerified publisher0.17.11 of 1See more

prometheus-smartctl-exporter prometheus-community 0.17.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/prometheuscommunity/smartctl-exporter:v0.14.0cfe22c36d7d2
stdlib@go1.23.7
1.26.9

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1,810
prometheus-statsd-exporterprometheus-communityVerified publisher1.0.01 of 1See more

prometheus-statsd-exporter prometheus-community 1.0.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
prom/statsd-exporter:v0.28.04e7a1f00b9b2
stdlib@go1.23.2
1.26.9

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1,333
proxmox-cloud-controller-managerproxmox-ccm0.2.321 of 1See more

proxmox-cloud-controller-manager proxmox-ccm 0.2.32

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/sergelogvinov/proxmox-cloud-controller-manager:v0.16.1474dbfd3be5c
stdlib@go1.27.1
1.26.9

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213
pvc-autoresizerpvc-autoresizerVerified publisher0.20.11 of 1See more

pvc-autoresizer pvc-autoresizer 0.20.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/topolvm/pvc-autoresizer:0.21.2d7885d57f6f9
stdlib@go1.25.14
1.26.9

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221
popeyeself-hosters-by-nightVerified publisher0.6.11 of 1See more

popeye self-hosters-by-night 0.6.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
derailed/popeye:v0.22.18e68e22c7663
stdlib@go1.23.5
1.26.9

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1,959
argo-watchershini4iVerified publisher1.4.11 of 1See more

argo-watcher shini4i 1.4.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/shini4i/argo-watcher:v1.4.20faab179997f
stdlib@go1.27.1
1.26.9

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213
fulciosigstoreVerified publisher2.11.45 of 6See more

fulcio sigstore 2.11.4

5 of the 6 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/sigstore/fulcio:v1.9.02de0226c5f82
stdlib@go1.27.1
1.26.9
ghcr.io/sigstore/scaffolding/createcertsdigest-pinned4d64dac937e2
stdlib@go1.25.0
1.26.9
ghcr.io/sigstore/scaffolding/createctconfig:v0.7.33e591f98e3899
stdlib@go1.25.0
1.26.9
ghcr.io/sigstore/scaffolding/createtree:v0.7.334c845ced03d8
stdlib@go1.25.0
1.26.9
ghcr.io/sigstore/scaffolding/ct_server:v0.7.3324293fa1ed50
stdlib@go1.25.0
1.26.9

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5,354
policy-controllersigstoreVerified publisher0.10.81 of 2See more

policy-controller sigstore 0.10.8

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/sigstore/policy-controller/policy-controllerdigest-pinned0bcd60beb93f
stdlib@go1.24.7
1.26.9

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1,439
pubsubplus-hasolaceVerified publisher3.10.01 of 1See more

pubsubplus-ha solace 3.10.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
solace/solace-pubsub-standard:latest3c8a8b7fdcae
stdlib@go1.26.8
1.26.9

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498
sops-secrets-operatorsops-secrets-operatorVerified publisher0.28.11 of 1See more

sops-secrets-operator sops-secrets-operator 0.28.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/isindir/sops-secrets-operator:0.21.27bba7083dfa0
stdlib@go1.26.5
1.26.9

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1,352
steampipe-powerpipe-kubernetessteampipe-powerpipe-kubernetesVerified publisher0.13.12 of 2See more

steampipe-powerpipe-kubernetes steampipe-powerpipe-kubernetes 0.13.1

2 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/oguzhan-yilmaz/steampipe-powerpipe-kubernetes--powerpipe:latesta16ab5ca10a7
stdlib@go1.26.1
1.26.9
ghcr.io/oguzhan-yilmaz/steampipe-powerpipe-kubernetes--steampipe:latestc0c8d53df9f3
stdlib@go1.26.1
1.26.9

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6,985
superstreamsuperstreamOfficialVerified publisher0.9.623 of 3See more

superstream superstream 0.9.62

3 of the 3 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
library/nats:2.10.25-alpine3290c829aa05
stdlib@go1.23.5
1.26.9
natsio/nats-server-config-reloader:0.16.1bf97e5e9b9d2
stdlib@go1.23.3
1.26.9
natsio/prometheus-nats-exporter:0.16.054b0d7ff058e
stdlib@go1.23.4
1.26.9

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5,107
topolvmtopolvmVerified publisher17.3.01 of 1See more

topolvm topolvm 17.3.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/topolvm/topolvm-with-sidecar:0.42.0719ab11d974a
stdlib@go1.26.8
1.26.9

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2,592
trivy-operator-polr-adaptertrivy-operator-polr-adapterVerified publisher0.11.51 of 1See more

trivy-operator-polr-adapter trivy-operator-polr-adapter 0.11.5

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/fjogeleit/trivy-operator-polr-adapter:0.11.537029b4d464f
stdlib@go1.26.4
1.26.9

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335
uffizzi-appuffizzi-app1.3.08 of 14See more

uffizzi-app uffizzi-app 1.3.0

8 of the 14 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
uffizzi/controller:latest0344805f267b
stdlib@go1.20.14
1.26.9
uffizzi/uffizzi-cluster-operator:v1.4.514e528bbd926
stdlib@go1.19.13
1.26.9
quay.io/jetstack/cert-manager-cainjector:v1.13.2858fee0c4af0
stdlib@go1.20.10
1.26.9
quay.io/jetstack/cert-manager-controller:v1.13.29c67cf8c92d8
stdlib@go1.20.10
1.26.9
quay.io/jetstack/cert-manager-ctl:v1.13.24d9fce2c050e
stdlib@go1.20.10
1.26.9
quay.io/jetstack/cert-manager-webhook:v1.13.20a9470447ebf
stdlib@go1.20.10
1.26.9
registry.k8s.io/ingress-nginx/controller:v1.9.45b161f051d01
stdlib@go1.21.3
1.26.9
registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20231011-8b53cabe0a7943503b45d
stdlib@go1.21.3
1.26.9

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26,536
vault-secrets-webhookvault-secrets-webhookVerified publisher1.23.11 of 1See more

vault-secrets-webhook vault-secrets-webhook 1.23.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/bank-vaults/vault-secrets-webhook:v1.23.198baf045a1c9
stdlib@go1.26.4
1.26.9

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858
athens-proxyvolker-raschekVerified publisher2.0.31 of 1See more

athens-proxy volker-raschek 2.0.3

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
gomods/athens:v0.17.10f61d1e62359
stdlib@go1.25.9
1.26.9

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2,795
wg-easywg-easyVerified publisher0.1.61 of 1See more

wg-easy wg-easy 0.1.6

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/wg-easy/wg-easy:150e7bc9d34e86
stdlib@go1.26.3
1.26.9

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1,294
dexwiremindVerified publisher2.15.71 of 2See more

dex wiremind 2.15.7

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/dexidp/dex:v2.24.0c9b7f6d0d953
stdlib@go1.13.10
1.26.9

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15,015
nfs-server-provisionerwso21.1.01 of 1See more

nfs-server-provisioner wso2 1.1.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/kubernetes_incubator/nfs-provisioner:v2.3.0f402e6039b3c
stdlib@go1.13.4
1.26.9

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4,116
yunikornyunikornVerified publisher1.10.03 of 3See more

yunikorn yunikorn 1.10.0

3 of the 3 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
apache/yunikorn:scheduler-1.10.049fc54894fdf
stdlib@go1.26.7
1.26.9
apache/yunikorn:web-1.10.090e6a62a578a
stdlib@go1.26.7
1.26.9
apache/yunikorn:admission-1.10.095c6b951f38a
stdlib@go1.26.7
1.26.9

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604
matrixzekker6Verified publisher3.32.01 of 4See more

matrix zekker6 3.32.0

1 of the 4 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
matrixdotorg/synapse:v1.162.06b84a7bbac36
stdlib@go1.24.4
1.26.9

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6,179
eshoponabpabp-charts1.0.02 of 15See more

eshoponabp abp-charts 1.0.0

2 of the 15 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
library/mongo:4.2699d652ed674
stdlib@go1.18.2
1.26.9
library/postgres:14.13162a6ead070
stdlib@go1.16.7
1.26.9

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24,207
moon2aerokube2.8.23 of 3See more

moon2 aerokube 2.8.2

3 of the 3 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/aerokube/moon:2.8.2072f3c5592dc
stdlib@go1.27.1
1.26.9
quay.io/aerokube/moon-conf:2.8.235c465ab25d8
stdlib@go1.27.1
1.26.9
quay.io/aerokube/moon-ui:2.8.2f374d0b9953b
stdlib@go1.27.1
1.26.9

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627
microgatewayairlock-microgatewayOfficialVerified publisher5.2.01 of 1See more

microgateway airlock-microgateway 5.2.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/airlock/microgateway-operatordigest-pinned48518d704307
stdlib@go1.27.1
1.26.9

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209
alerta-webalerta-webVerified publisher0.1.121 of 2See more

alerta-web alerta-web 0.1.12

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
bitnamilegacy/postgresql:15.2.0-debian-11-r113e65a6b89e38
stdlib@go1.18.2
1.26.9

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4,808
pod-gatewayangelnu7.1.11 of 2See more

pod-gateway angelnu 7.1.1

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/angelnu/gateway-admision-controller:v3.12.06f6ab596afd5
stdlib@go1.24.2
1.26.9

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1,866
tt-rssangelnu7.0.01 of 2See more

tt-rss angelnu 7.0.0

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/angelnu/tt-rss:2.0.100809fb02162f151
stdlib@go1.26.7
1.26.9

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983
ansible-semaphoreansible-semaphore0.1.01 of 1See more

ansible-semaphore ansible-semaphore 0.1.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ansiblesemaphore/semaphore:v2.8.5303d1f8684027
stdlib@go1.16.3
1.26.9

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5,096
aperture-controlleraperture2.34.04 of 5See more

aperture-controller aperture 2.34.0

4 of the 5 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
bitnami/kubectl:latestf7f9e4f64d9e
stdlib@go1.26.8
1.26.9
fluxninja/aperture-operator:2.34.0356d7aa86632
stdlib@go1.21.5
1.26.9
jimmidyson/configmap-reload:v0.5.0904d08e9f701
stdlib@go1.15.7
1.26.9
quay.io/prometheus/prometheus:v2.33.591100b06e86d
stdlib@go1.17.8
1.26.9

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7,671
k8upappuio2.0.51 of 1See more

k8up appuio 2.0.5

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/k8up-io/k8up:v2.3.257419b6d3830
stdlib@go1.18
1.26.9

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4,380
limesurveyarea-42Verified publisher0.3.1011See more

limesurvey area-42 0.3.101

1 container image this version deploys carries CVE-2026-56866.

Container imageDigestPackageFixed in
bitnamilegacy/mariadb:12.0.2-debian-12-r0888cdaae3cb9
stdlib@go1.25.0
1.26.9

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—
artifact-controllerartifact-controllerOfficialVerified publisher0.9.11 of 1See more

artifact-controller artifact-controller 0.9.1

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
ghcr.io/kargops/artifact-controller:v0.9.10b42a68e9e27
stdlib@go1.26.7
1.26.9

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209
athens-proxyathens-chartsOfficialVerified publisher0.18.01 of 1See more

athens-proxy athens-charts 0.18.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
gomods/athens:v0.19.2e1abe3005673
stdlib@go1.26.8
1.26.9

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911
openshift-consoleav1o-chartsVerified publisher0.3.61 of 1See more

openshift-console av1o-charts 0.3.6

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/openshift/origin-console:4.10.00bbe8b451fa3
stdlib@go1.16.9
1.26.9

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10,370
prometheusaveshaVerified publisher19.3.04 of 4See more

prometheus avesha 19.3.0

4 of the 4 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
jimmidyson/configmap-reload:v0.8.05af9d3041d12
stdlib@go1.19.2
1.26.9
quay.io/prometheus/node-exporter:v1.5.039c642b2b337
stdlib@go1.19.3
1.26.9
quay.io/prometheus/prometheus:v2.41.01a3e9a878e50
stdlib@go1.19.4
1.26.9
registry.k8s.io/kube-state-metrics/kube-state-metrics:v2.7.0a15ca437f230
stdlib@go1.19.3
1.26.9

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8,749
aws-calicoaws0.3.111 of 1See more

aws-calico aws 0.3.11

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/tigera/operator:v1.20.1379efe0c2541
stdlib@go1.15.2
1.26.9

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3,491
aws-node-termination-handleraws-node-termination-handler0.27.61 of 1See more

aws-node-termination-handler aws-node-termination-handler 0.27.6

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
public.ecr.aws/aws-ec2/aws-node-termination-handler:v1.25.69ad31fb4e5be
stdlib@go1.25.8
1.26.9

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927
snapschedulerbackube-helm-chartsVerified publisher3.5.02 of 2See more

snapscheduler backube-helm-charts 3.5.0

2 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/backube/snapscheduler:3.5.035ac95c51780
stdlib@go1.24.3
1.26.9
quay.io/brancz/kube-rbac-proxy:v0.19.19f21034731c7
stdlib@go1.24.2
1.26.9

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2,276
yataibentomlVerified publisher1.1.131 of 1See more

yatai bentoml 1.1.13

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/bentoml/yatai:1.1.13a5dc9d91de0d
stdlib@go1.20.7
1.26.9

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2,621
yatai-deploymentbentomlVerified publisher1.1.211 of 2See more

yatai-deployment bentoml 1.1.21

1 of the 2 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/bentoml/yatai-deployment:1.1.212342cfe8c2a9
stdlib@go1.19.13
1.26.9

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1,872
boundaryboundaryVerified publisher0.1.01 of 1See more

boundary boundary 0.1.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
hashicorp/boundary:0.21.037bf86488b74
stdlib@go1.25.1
1.26.9

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2,158
backup-zenbzen0.1.41 of 1See more

backup-zen bzen 0.1.4

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
rezachalak/bzen-mongo:1.0.034f694325191
stdlib@go1.19.12
1.26.9

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70,496
caddy-ingress-controllercaddy-ingress1.3.01 of 1See more

caddy-ingress-controller caddy-ingress 1.3.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
caddy/ingress:v0.2.118d1366fc0e9
stdlib@go1.21.4
1.26.9

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2,615
cadvisorcadvisorVerified publisher0.1.151 of 1See more

cadvisor cadvisor 0.1.15

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
gcr.io/cadvisor/cadvisor:v0.47.2e6c562b5e983
stdlib@go1.19.9
1.26.9

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2,423
geoservercloudcamptocamp23.0.17 of 7See more

geoservercloud camptocamp2 3.0.1

7 of the 7 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
geoservercloud/geoserver-cloud-gateway:3.0.1.1de0b20bd2a43
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-gwc:3.0.1.1b04ed89b5d2b
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-rest:3.0.1.1318254b52f96
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-wcs:3.0.1.14f077124f591
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-webui:3.0.1.14f91e3048ac8
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-wfs:3.0.1.1299f0d6232d1
stdlib@go1.26.5
1.26.9
geoservercloud/geoserver-cloud-wms:3.0.1.15164f687ce4d
stdlib@go1.26.5
1.26.9

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15,921
version-checkercert-managerVerified publisher0.11.01 of 1See more

version-checker cert-manager 0.11.0

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/jetstack/version-checker:v0.11.0eae9a374d22f
stdlib@go1.26.4
1.26.9

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583
cert-managerchoerodon1.8.24 of 4See more

cert-manager choerodon 1.8.2

4 of the 4 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
quay.io/jetstack/cert-manager-cainjector:v1.8.2c010246124c2
stdlib@go1.17.11
1.26.9
quay.io/jetstack/cert-manager-controller:v1.8.2a20c44021a5d
stdlib@go1.17.11
1.26.9
quay.io/jetstack/cert-manager-ctl:v1.8.281b2d775edad
stdlib@go1.17.11
1.26.9
quay.io/jetstack/cert-manager-webhook:v1.8.2ada7edd90bec
stdlib@go1.17.11
1.26.9

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11,797
popeyechristianhuthVerified publisher2.4.31 of 1See more

popeye christianhuth 2.4.3

1 of the 1 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
derailed/popeye:v0.22.18e68e22c7663
stdlib@go1.23.5
1.26.9

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1,959

Container images carrying it

6,105 by charts deploying them

A fixed version is listed for 1 of the 2 affected packages.

No deployed image carries CVE-2026-56866.

syft 1.42.1 · advisories as of 13 Oct 2026

Corrections: contact@stackradar.io

Catalogue: Artifact Hub · Advisories: OSV · Exploitation: FIRST EPSS, CISA KEV.