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
5,293
of 18,131 indexed, latest versions
Container images
6,123
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 5,293 of 18,131 indexed charts deploy, on 6,123 images.

Affected packageAffected versionsFixed inImages
stdlibgolanggo1.13, go1.13.1, go1.13.3, go1.13.4+209 more1.26.96,123
golang-1.19deb1.19.8-2no fix listed1
OSV records
DEBIAN-CVE-2026-56866GO-2026-6605
Trending
Rank 10 in indexed charts, since 9 Oct 2026. See the ranking →

Charts affected

5,293 by stars
ChartLatestAffected imagesRadar Score
akp-crd-managerappscodeVerified publisher2026.10.121 of 1See more

akp-crd-manager appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/akp-crd-manager:v0.0.19b9e216a714a
stdlib@go1.25.13
1.26.9

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684
appcatalogappscodeVerified publisher2023.3.231 of 1See more

appcatalog appscode 2023.3.23

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

Container imageDigestPackageFixed in
ghcr.io/appscode/appcatalog:v0.0.109709a346888
stdlib@go1.20.5
1.26.9

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2,382
appscode-otel-stackappscodeVerified publisher2026.9.223 of 3See more

appscode-otel-stack appscode 2026.9.22

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

Container imageDigestPackageFixed in
rancher/kubectl:v1.34.1090bef429ed1
stdlib@go1.24.6
1.26.9
ghcr.io/open-telemetry/opentelemetry-operator/opentelemetry-operator:0.150.089490ef63b72
stdlib@go1.26.2
1.26.9
quay.io/brancz/kube-rbac-proxy:v0.20.0147cb28fea35
stdlib@go1.25.1
1.26.9

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2,823
auditorappscodeVerified publisher2023.10.11 of 1See more

auditor appscode 2023.10.1

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

Container imageDigestPackageFixed in
ghcr.io/appscode/auditor:v0.0.1c62c89ee706d
stdlib@go1.19.4
1.26.9

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2,525
aws-credential-managerappscodeVerified publisher2026.4.161 of 1See more

aws-credential-manager appscode 2026.4.16

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

Container imageDigestPackageFixed in
ghcr.io/appscode/aws-credential-manager:v0.1.00511bbe501c3
stdlib@go1.25.9
1.26.9

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994
azure-credential-managerappscodeVerified publisher2026.4.161 of 1See more

azure-credential-manager appscode 2026.4.16

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

Container imageDigestPackageFixed in
ghcr.io/appscode/azure-credential-manager:v0.1.0f5c797f7fbe7
stdlib@go1.25.9
1.26.9

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1,272
billingappscodeVerified publisher2026.10.121 of 1See more

billing appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/b3:v2026.10.1265bce2a5ff54
stdlib@go1.25.3
1.26.9

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2,730
capa-vpc-peering-operatorappscodeVerified publisher2023.12.111 of 1See more

capa-vpc-peering-operator appscode 2023.12.11

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

Container imageDigestPackageFixed in
ghcr.io/appscode/capa-vpc-peering-operator:v0.0.4b1557553a2b3
stdlib@go1.21.5
1.26.9

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2,102
capi-ops-managerappscodeVerified publisher2024.8.142 of 2See more

capi-ops-manager appscode 2024.8.14

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

Container imageDigestPackageFixed in
ghcr.io/appscode/capi-ops-manager:v0.0.57465f35b684c
stdlib@go1.23.2
1.26.9
ghcr.io/appscode/kube-rbac-proxy:v0.11.00df4ae70e3bd
stdlib@go1.15.14
1.26.9

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5,355
catalog-managerappscodeVerified publisher2026.10.121 of 1See more

catalog-manager appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/catalog-manager:v0.14.05e9a05238ed5
stdlib@go1.25.13
1.26.9

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351
cattlesetappscodeVerified publisher2026.7.81 of 1See more

cattleset appscode 2026.7.8

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

Container imageDigestPackageFixed in
ghcr.io/appscode/cattleset:v0.0.145554a03e448
stdlib@go1.25.11
1.26.9

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1,049
cert-manager-csi-driver-cacertsappscodeVerified publisher2026.9.183 of 3See more

cert-manager-csi-driver-cacerts appscode 2026.9.18

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

Container imageDigestPackageFixed in
ghcr.io/appscode/csi-driver-cacerts:v0.6.0ab213b156017
stdlib@go1.25.13
1.26.9
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.14.05244abbe87e0
stdlib@go1.24.2
1.26.9
registry.k8s.io/sig-storage/livenessprobe:v2.16.088092d100909
stdlib@go1.24.2
1.26.9

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3,979
cert-manager-webhook-aceappscodeVerified publisher2026.10.121 of 1See more

cert-manager-webhook-ace appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/cert-manager-webhook-ace:v0.0.2dc6b5fdcec06
stdlib@go1.25.5
1.26.9

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1,822
clickhouse-uiappscodeVerified publisher2026.3.301 of 1See more

clickhouse-ui appscode 2026.3.30

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

Container imageDigestPackageFixed in
ghcr.io/caioricciuti/ch-ui:v2.14.180f4d92c2d8d
stdlib@go1.26.8
1.26.9

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213
cluster-auth-agentappscodeVerified publisher2026.2.161 of 1See more

cluster-auth-agent appscode 2026.2.16

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-auth:v0.5.1fba6fb872281
stdlib@go1.25.7
1.26.9

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1,443
cluster-auth-managerappscodeVerified publisher2026.2.161 of 1See more

cluster-auth-manager appscode 2026.2.16

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-auth:v0.5.1fba6fb872281
stdlib@go1.25.7
1.26.9

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1,443
cluster-connectorappscodeVerified publisher2025.12.151 of 1See more

cluster-connector appscode 2025.12.15

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

Container imageDigestPackageFixed in
ghcr.io/appscode/cluster-connector:v0.0.140efd9d9ef6ca
stdlib@go1.25.5
1.26.9

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1,065
cluster-gatewayappscodeVerified publisher2026.6.261 of 1See more

cluster-gateway appscode 2026.6.26

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-gateway:v1.12.158bed8d1e7fc
stdlib@go1.25.11
1.26.9

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1,080
cluster-gateway-managerappscodeVerified publisher2026.6.261 of 1See more

cluster-gateway-manager appscode 2026.6.26

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-gateway-manager:v1.12.1f22cae0e6cf3
stdlib@go1.25.11
1.26.9

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1,080
cluster-importerappscodeVerified publisher2026.10.121 of 1See more

cluster-importer appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/ace:v0.2.0b8e03da90e70
stdlib@go1.25.9
1.26.9

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1,483
cluster-manager-hubappscodeVerified publisher2026.2.161 of 1See more

cluster-manager-hub appscode 2026.2.16

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/registration-operator:v1.2.00cbced8e6240
stdlib@go1.25.7
1.26.9

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1,593
cluster-presetsappscodeVerified publisher2026.10.121 of 1See more

cluster-presets appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/cluster-presets:v0.0.128fbdd2479645
stdlib@go1.25.11
1.26.9

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750
cluster-profile-managerappscodeVerified publisher2026.9.181 of 1See more

cluster-profile-manager appscode 2026.9.18

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-profile:v0.13.0b8b0aaef2543
stdlib@go1.25.13
1.26.9

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404
cluster-proxyappscodeVerified publisher2024.2.251 of 1See more

cluster-proxy appscode 2024.2.25

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-proxy:latest27a5c64b7ea8
stdlib@go1.21.8
1.26.9

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1,767
cluster-proxy-managerappscodeVerified publisher2026.6.261 of 1See more

cluster-proxy-manager appscode 2026.6.26

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/cluster-proxy:v0.10.1a7fce69e171c
stdlib@go1.25.11
1.26.9

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2,276
crd-managerappscodeVerified publisher2026.10.101 of 1See more

crd-manager appscode 2026.10.10

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

Container imageDigestPackageFixed in
ghcr.io/voyagermesh/crd-manager:v0.4.04466bb77dc78
stdlib@go1.25.13
1.26.9

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1,106
dns-proxyappscodeVerified publisher2026.10.121 of 1See more

dns-proxy appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/cloudflare-dns-proxy:v0.0.5dfbef0285e14
stdlib@go1.25.5
1.26.9

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1,099
docker-machine-operatorappscodeVerified publisher2024.7.91 of 1See more

docker-machine-operator appscode 2024.7.9

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

Container imageDigestPackageFixed in
ghcr.io/appscode/docker-machine-operator:v0.0.481f6007abb4e
stdlib@go1.22.4
1.26.9

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2,961
external-dns-operatorappscodeVerified publisher2026.6.221 of 1See more

external-dns-operator appscode 2026.6.22

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

Container imageDigestPackageFixed in
ghcr.io/appscode/external-dns-operator:v0.4.05605f97e636d
stdlib@go1.25.12
1.26.9

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686
falco-ui-serverappscodeVerified publisher2026.1.152 of 2See more

falco-ui-server appscode 2026.1.15

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

Container imageDigestPackageFixed in
rancher/kine:v0.11.412889bbcd1e8
stdlib@go1.21.5
1.26.9
ghcr.io/appscode/falco-ui-server:v0.0.66ec488d89b56
stdlib@go1.25.5
1.26.9

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4,092
fargocdappscodeVerified publisher2026.9.181 of 1See more

fargocd appscode 2026.9.18

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

Container imageDigestPackageFixed in
ghcr.io/appscode/fargocd:v0.1.0c59d775d9a7c
stdlib@go1.25.13
1.26.9

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750
fargocd-managerappscodeVerified publisher2026.9.181 of 1See more

fargocd-manager appscode 2026.9.18

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

Container imageDigestPackageFixed in
ghcr.io/appscode/fargocd:v0.1.0c59d775d9a7c
stdlib@go1.25.13
1.26.9

Open the chart page →

750
fluxcd-addon-managerappscodeVerified publisher2024.2.251 of 1See more

fluxcd-addon-manager appscode 2024.2.25

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/fluxcd-addon:v0.0.23acba3df8827
stdlib@go1.22.3
1.26.9

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1,924
fluxcd-managerappscodeVerified publisher2026.9.181 of 1See more

fluxcd-manager appscode 2026.9.18

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

Container imageDigestPackageFixed in
ghcr.io/kluster-manager/fluxcd-addon:v0.0.1137105f529ed0
stdlib@go1.25.13
1.26.9

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694
gateway-converterappscodeVerified publisher2024.8.301 of 1See more

gateway-converter appscode 2024.8.30

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

Container imageDigestPackageFixed in
ghcr.io/voyagermesh/gateway-converter:v0.0.1b92123805584
stdlib@go1.23.1
1.26.9

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1,844
gcp-credential-managerappscodeVerified publisher2026.3.111 of 1See more

gcp-credential-manager appscode 2026.3.11

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

Container imageDigestPackageFixed in
ghcr.io/appscode/gcp-credential-manager:v0.1.0b58345fe8209
stdlib@go1.25.8
1.26.9

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1,486
gh-ci-webhookappscodeVerified publisher2026.10.121 of 1See more

gh-ci-webhook appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/gh-ci-webhook:v0.0.2036ce246d884e
stdlib@go1.24.0
1.26.9

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2,004
grafanaappscodeVerified publisher2026.10.121 of 1See more

grafana appscode 2026.10.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/grafana:v2025.2.367d18880448c
stdlib@go1.17.1
1.26.9

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3,472
grafana-operatorappscodeVerified publisher2026.6.121 of 1See more

grafana-operator appscode 2026.6.12

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

Container imageDigestPackageFixed in
ghcr.io/appscode/grafana-tools:v0.8.077c9d29080eb
stdlib@go1.25.13
1.26.9

Open the chart page →

641
grafana-opscenterappscodeVerified publisher2023.3.231 of 1See more

grafana-opscenter appscode 2023.3.23

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

Container imageDigestPackageFixed in
ghcr.io/appscode/grafana-tools:v0.0.22c7b9b0a9101
stdlib@go1.20.2
1.26.9

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2,227
grafana-ui-serverappscodeVerified publisher2022.6.141 of 1See more

grafana-ui-server appscode 2022.6.14

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

Container imageDigestPackageFixed in
ghcr.io/appscode/grafana-tools:v0.0.1f60324bca644
stdlib@go1.19.4
1.26.9

Open the chart page →

2,423
inbox-agentappscodeVerified publisher2026.6.22 of 2See more

inbox-agent appscode 2026.6.2

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

Container imageDigestPackageFixed in
ghcr.io/appscode/inbox-agent:v0.0.6f630e47772c9
stdlib@go1.25.13
1.26.9
ghcr.io/appscode/kube-rbac-proxy:v0.15.0d8cc6ffb9819
stdlib@go1.21.3
1.26.9

Open the chart page →

2,827
inbox-server-distributedappscodeVerified publisher2025.12.251 of 4See more

inbox-server-distributed appscode 2025.12.25

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

Container imageDigestPackageFixed in
library/cassandra:4.1.37cbcec0086ac
stdlib@go1.18.2
1.26.9

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18,286
james-komposeappscodeVerified publisher0.1.01 of 4See more

james-kompose appscode 0.1.0

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

Container imageDigestPackageFixed in
library/cassandra:4.1.37cbcec0086ac
stdlib@go1.18.2
1.26.9

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19,751
kube-auth-managerappscodeVerified publisher2023.11.141 of 1See more

kube-auth-manager appscode 2023.11.14

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

Container imageDigestPackageFixed in
ghcr.io/appscode/kube-auth-manager:v0.0.1789692ab9193
stdlib@go1.20.2
1.26.9

Open the chart page →

2,740
kube-auth-proxyappscodeVerified publisher2023.11.141 of 1See more

kube-auth-proxy appscode 2023.11.14

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

Container imageDigestPackageFixed in
ghcr.io/appscode/kube-auth-manager:v0.0.1789692ab9193
stdlib@go1.20.2
1.26.9

Open the chart page →

2,740
kube-bind-serverappscodeVerified publisher2023.3.231 of 1See more

kube-bind-server appscode 2023.3.23

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

Container imageDigestPackageFixed in
ghcr.io/appscode/kube-bind-server:v0.0.11762f3f6bb71
stdlib@go1.20.2
1.26.9

Open the chart page →

2,848
kubedb-certifiedappscodeVerified publisher2026.7.108 of 8See more

kubedb-certified appscode 2026.7.10

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

Container imageDigestPackageFixed in
ghcr.io/appscode/kubectl-nonroot:1.340b26892cec94
stdlib@go1.24.13
1.26.9
ghcr.io/appscode/petset:v0.1.093fa0daf603c
stdlib@go1.25.10
1.26.9
ghcr.io/appscode/sidekick:v0.0.15d1036b07e348
stdlib@go1.25.11
1.26.9
ghcr.io/kubedb/kubedb-autoscaler:v0.51.05d1182ac21f0
stdlib@go1.25.12
1.26.9
ghcr.io/kubedb/kubedb-crd-manager:v0.21.09506a6cb98d1
stdlib@go1.25.12
1.26.9
ghcr.io/kubedb/kubedb-ops-manager:v0.53.06d4c9fe66e4f
stdlib@go1.25.12
1.26.9
ghcr.io/kubedb/kubedb-provisioner:v0.66.0e7041c3b41e7
stdlib@go1.25.13
1.26.9
ghcr.io/kubedb/kubedb-webhook-server:v0.42.0e0f4431c4704
stdlib@go1.25.13
1.26.9

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7,478
kubedb-communityappscodeVerified publisher0.24.21 of 2See more

kubedb-community appscode 0.24.2

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

Container imageDigestPackageFixed in
kubedb/operator:v0.24.01a06ff0bda52
stdlib@go1.17.6
1.26.9

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3,841
kubedb-enterpriseappscodeVerified publisher0.11.21 of 2See more

kubedb-enterprise appscode 0.11.2

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

Container imageDigestPackageFixed in
kubedb/kubedb-enterprise:v0.11.05829bcedcb0d
stdlib@go1.17.3
1.26.9

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3,880

Container images carrying it

6,123 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 15 Oct 2026

Corrections: contact@stackradar.io

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