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
5,220
of 18,137 indexed, latest versions
Container images
6,032
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 5,220 of 18,137 indexed charts deploy, on 6,032 images.

Affected packageAffected versionsFixed inImages
stdlibgolanggo1.13, go1.13.1, go1.13.3, go1.13.4+208 more1.26.96,032
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

5,220 by stars
ChartLatestAffected imagesRadar Score
traefikitscontainedVerified publisher9.18.41 of 1See more

traefik itscontained 9.18.4

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

Container imageDigestPackageFixed in
library/traefik:2.4.8eda951fd29a8
stdlib@go1.16.2
1.26.9

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4,623
hetzner-dyndnsitsmethemojoVerified publisher1.4.01 of 1See more

hetzner-dyndns itsmethemojo 1.4.0

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

Container imageDigestPackageFixed in
hashicorp/terraform:1.9.7b77efab1a448
stdlib@go1.22.7
1.26.9

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2,429
thehiveittrident-oss0.1.01 of 6See more

thehive ittrident-oss 0.1.0

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

Container imageDigestPackageFixed in
library/cassandra:4.00909b1681015
stdlib@go1.24.6
1.26.9

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5,523
jaasjaasVerified publisher2026.10.50532331 of 1See more

jaas jaas 2026.10.5053233

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

Container imageDigestPackageFixed in
ghcr.io/metio/jaas:2026.10.50431184261a31d1e17
stdlib@go1.27.1
1.26.9

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238
adguard-homejacobcolvinVerified publisher0.4.01 of 2See more

adguard-home jacobcolvin 0.4.0

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

Container imageDigestPackageFixed in
adguard/adguardhome:v0.107.3843ec119419a9
stdlib@go1.20.8
1.26.9

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2,307
inlets-clientjacobcolvinVerified publisher0.1.21 of 1See more

inlets-client jacobcolvin 0.1.2

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

Container imageDigestPackageFixed in
ghcr.io/cubed-it/inlets:4.0.0f02325f099bc
stdlib@go1.13.15
1.26.9

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2,964
inlets-serverjacobcolvinVerified publisher0.1.11 of 1See more

inlets-server jacobcolvin 0.1.1

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

Container imageDigestPackageFixed in
ghcr.io/cubed-it/inlets:4.0.0f02325f099bc
stdlib@go1.13.15
1.26.9

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2,964
opencloudjacobcolvinVerified publisher0.2.32 of 13See more

opencloud jacobcolvin 0.2.3

2 of the 13 container images this version deploys carry CVE-2026-56866.

Container imageDigestPackageFixed in
library/postgres:alpine77f585114c32
stdlib@go1.24.6
1.26.9
opencloudeu/opencloud-rolling:2.1.0f9634bb04905
stdlib@go1.24.2
1.26.9

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49,338
osrs-ge-exporterjacobcolvinVerified publisher0.4.01 of 1See more

osrs-ge-exporter jacobcolvin 0.4.0

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

Container imageDigestPackageFixed in
macropower/osrs_ge_exporter:v0.3c77ab5ea955c
stdlib@go1.21.0
1.26.9

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1,172
rclonejacobcolvinVerified publisher1.0.11 of 1See more

rclone jacobcolvin 1.0.1

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

Container imageDigestPackageFixed in
rclone/rclone:1.63.008e1af3c8814
stdlib@go1.20.5
1.26.9

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2,856
twitch-predictions-recorderjacobcolvinVerified publisher0.1.01 of 1See more

twitch-predictions-recorder jacobcolvin 0.1.0

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

Container imageDigestPackageFixed in
macropower/twitch_predictions_recorder:v0.21e9c4fb89787
stdlib@go1.19.2
1.26.9

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4,403
wakatime-exporterjacobcolvinVerified publisher0.1.11 of 1See more

wakatime-exporter jacobcolvin 0.1.1

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

Container imageDigestPackageFixed in
macropower/wakatime-exporter:0.1.0dbb05debb785
stdlib@go1.14.6
1.26.9

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2,397
wireguard-operatorjacobcolvinVerified publisher0.2.01 of 2See more

wireguard-operator jacobcolvin 0.2.0

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

Container imageDigestPackageFixed in
ghcr.io/jodevsa/wireguard-operator/manager:v2.0.2839412bdd403b
stdlib@go1.22.2
1.26.9

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1,436
koptimizejaconiVerified publisher0.5.42 of 2See more

koptimize jaconi 0.5.4

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

Container imageDigestPackageFixed in
alpine/k8s:1.27.321b24e6bf801
stdlib@go1.20.4
1.26.9
ghcr.io/jaconi-io/koptimize:1.2.5aca1bbd609b6
stdlib@go1.20.7
1.26.9

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7,457
mini-infrajaeki0.1.01 of 4See more

mini-infra jaeki 0.1.0

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

Container imageDigestPackageFixed in
quay.io/metallb/controller:v0.13.101b33357b3595
stdlib@go1.19.5
1.26.9

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2,573
todo-operatorjakuboskera0.1.11 of 1See more

todo-operator jakuboskera 0.1.1

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

Container imageDigestPackageFixed in
jakuboskera/todo-operator:v0.1.0a305b8ce5bff
stdlib@go1.25.3
1.26.9

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738
deconzjanip81-helm-chartsVerified publisher0.1.11 of 1See more

deconz janip81-helm-charts 0.1.1

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

Container imageDigestPackageFixed in
deconzcommunity/deconz:2.29.2062de2362641
stdlib@go1.19.8
1.26.9

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12,278
ghostjanip81-helm-chartsVerified publisher0.1.21 of 1See more

ghost janip81-helm-charts 0.1.2

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

Container imageDigestPackageFixed in
library/ghost:6.37.01ef2e532ca4d
stdlib@go1.23.12
1.26.9

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4,800
n8njanip81-helm-chartsVerified publisher0.1.51 of 1See more

n8n janip81-helm-charts 0.1.5

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

Container imageDigestPackageFixed in
n8nio/n8n:1.86.08b39ed5a2de9
stdlib@go1.24.0
1.26.9

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7,223
unifi-network-applicationjanip81-helm-chartsVerified publisher0.2.91 of 3See more

unifi-network-application janip81-helm-charts 0.2.9

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

Container imageDigestPackageFixed in
library/mongo:7.01f995ad6fdb9
stdlib@go1.26.8
1.26.9

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2,508
janus-shieldjanus-shield1.0.01 of 2See more

janus-shield janus-shield 1.0.0

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

Container imageDigestPackageFixed in
quay.io/cilium/tetragon:v1.1.096fac2482898
stdlib@go1.22.2
1.26.9

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3,304
javascriptweeklyjavascriptweekly2.1.01 of 1See more

javascriptweekly javascriptweekly 2.1.0

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

Container imageDigestPackageFixed in
zufardhiyaulhaq/javascriptweekly:v2.1.086424bd0b2a4
stdlib@go1.17.13
1.26.9

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2,124
sql-exporterjdstoneVerified publisher0.2.11 of 1See more

sql-exporter jdstone 0.2.1

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

Container imageDigestPackageFixed in
burningalchemist/sql_exporter:0.16.0b8e4757c7def
stdlib@go1.23.2
1.26.9

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1,455
newtjeffrescVerified publisher0.2.11 of 1See more

newt jeffresc 0.2.1

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

Container imageDigestPackageFixed in
fosrl/newt:1.10.4ccd2b0e9a049
stdlib@go1.25.8
1.26.9

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1,516
jenkinsjenkins-automation-tool0.1.01 of 1See more

jenkins jenkins-automation-tool 0.1.0

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

Container imageDigestPackageFixed in
jenkins/jenkins:ltsa660310e39ad
stdlib@go1.27.0
1.26.9

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2,194
jenkinsjenkins-automation-tool-by-helm0.1.01 of 1See more

jenkins jenkins-automation-tool-by-helm 0.1.0

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

Container imageDigestPackageFixed in
jenkins/jenkins:ltsa660310e39ad
stdlib@go1.27.0
1.26.9

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2,194
jenkinsjenkins-chartVerified publisher0.1.01 of 1See more

jenkins jenkins-chart 0.1.0

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

Container imageDigestPackageFixed in
jenkins/jenkins:ltsa660310e39ad
stdlib@go1.27.0
1.26.9

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2,194
athens-proxyjenkins-x0.2.21 of 2See more

athens-proxy jenkins-x 0.2.2

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

Container imageDigestPackageFixed in
jaegertracing/all-in-one:latestab6f1a1f0fb4
stdlib@go1.25.4
1.26.9

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1,830
jx-app-athensjenkins-x0.0.181 of 1See more

jx-app-athens jenkins-x 0.0.18

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

Container imageDigestPackageFixed in
gomods/athens:v0.8.1d714c7ff0231
stdlib@go1.13.4
1.26.9

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5,558
jx-app-datadogjenkins-x0.0.101 of 2See more

jx-app-datadog jenkins-x 0.0.10

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

Container imageDigestPackageFixed in
datadog/agent:6aad9994de6a7
stdlib@go1.21.11
1.26.9

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5,040
jx-app-flaggerjenkins-x0.0.52 of 2See more

jx-app-flagger jenkins-x 0.0.5

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

Container imageDigestPackageFixed in
grafana/grafana:6.5.1befcd84da2c1
stdlib@go1.13.1
1.26.9
weaveworks/flagger:1.0.0-rc.5174307de1b36
stdlib@go1.14.2
1.26.9

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8,609
jx-app-jenkinsjenkins-x0.0.151 of 2See more

jx-app-jenkins jenkins-x 0.0.15

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

Container imageDigestPackageFixed in
jenkins/jenkins:ltsa660310e39ad
stdlib@go1.27.0
1.26.9

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2,194
knative-servingjenkins-x0.19.124 of 4See more

knative-serving jenkins-x 0.19.12

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

Container imageDigestPackageFixed in
gcr.io/knative-releases/knative.dev/serving/cmd/activatordigest-pinned1e3db4f2eeed
stdlib@go1.14.10
1.26.9
gcr.io/knative-releases/knative.dev/serving/cmd/autoscalerdigest-pinneddb6ceff2aab4
stdlib@go1.14.10
1.26.9
gcr.io/knative-releases/knative.dev/serving/cmd/controllerdigest-pinnedb2cd45b8a8a4
stdlib@go1.14.10
1.26.9
gcr.io/knative-releases/knative.dev/serving/cmd/webhookdigest-pinnedd27b4495ccc3
stdlib@go1.14.10
1.26.9

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14,656
jetspotterjetspotter1.49.01 of 1See more

jetspotter jetspotter 1.49.0

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

Container imageDigestPackageFixed in
ghcr.io/vvanouytsel/jetspotter:1.49.0d6f9149a36db
stdlib@go1.23.12
1.26.9

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1,142
ingress-nginxjfrog4.5.22 of 2See more

ingress-nginx jfrog 4.5.2

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

Container imageDigestPackageFixed in
registry.k8s.io/ingress-nginx/controller:v1.6.415be4666c530
stdlib@go1.19.4
1.26.9
registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20220916-gd32f8c34339c5b2e3310d
stdlib@go1.19.1
1.26.9

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5,503
vaultjfrog0.25.02 of 2See more

vault jfrog 0.25.0

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

Container imageDigestPackageFixed in
hashicorp/vault:1.14.0b2177a8bfe85
stdlib@go1.20.5
1.26.9
hashicorp/vault-k8s:1.2.14500e988b7ce
stdlib@go1.20.3
1.26.9

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5,485
kafka-offset-lag-for-prometheusjhidalgo3-githubVerified publisher2.3.01 of 1See more

kafka-offset-lag-for-prometheus jhidalgo3-github 2.3.0

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

Container imageDigestPackageFixed in
jhidalgo3/kafka-offset-lag-for-prometheus:latest0390e155c46d
stdlib@go1.17.13
1.26.9

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2,368
missing-container-metricsjimdo-missing-container-metrics0.5.01 of 1See more

missing-container-metrics jimdo-missing-container-metrics 0.5.0

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

Container imageDigestPackageFixed in
dmilhdef/missing-container-metrics:v0.21.0fada1a6e7638
stdlib@go1.16.2
1.26.9

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3,656
cloudflare-tunneljmmaloney40.1.31 of 1See more

cloudflare-tunnel jmmaloney4 0.1.3

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

Container imageDigestPackageFixed in
cloudflare/cloudflared:2022.1.361f608cd1123
stdlib@go1.17.1
1.26.9

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3,747
ipfsjmmaloney40.9.231 of 1See more

ipfs jmmaloney4 0.9.23

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

Container imageDigestPackageFixed in
ipfs/go-ipfs:v0.27.0bfce363b878b
stdlib@go1.19.8
1.26.9

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2,142
job-manager-syncerjob-manager-syncer1.27.01 of 1See more

job-manager-syncer job-manager-syncer 1.27.0

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

Container imageDigestPackageFixed in
public.ecr.aws/cloudnatix/llmariner/job-manager-syncer:1.27.086957bbeeff5
stdlib@go1.23.12
1.26.9

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951
job-pod-reaperjob-pod-reaper0.14.01 of 1See more

job-pod-reaper job-pod-reaper 0.14.0

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

Container imageDigestPackageFixed in
quay.io/ohiosupercomputercenter/job-pod-reaper:v0.14.0775449888968
stdlib@go1.26.4
1.26.9

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347
haven-complinacy-dashboardjolle-devVerified publisher1.0.01 of 2See more

haven-complinacy-dashboard jolle-dev 1.0.0

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

Container imageDigestPackageFixed in
j0113/haven-compliancy-dashboard:1.3696cb8ca9f4e
stdlib@go1.17.2
1.26.9

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6,272
BNSdeployjongseo220.1.01 of 8See more

BNSdeploy jongseo22 0.1.0

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

Container imageDigestPackageFixed in
bitnami/kubectl:latestf7f9e4f64d9e
stdlib@go1.26.8
1.26.9

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226
cloudnative-pgjouveVerified publisher0.27.01 of 1See more

cloudnative-pg jouve 0.27.0

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

Container imageDigestPackageFixed in
ghcr.io/cloudnative-pg/cloudnative-pg:1.28.034198e85b6e6
stdlib@go1.25.5
1.26.9

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1,091
corednsjouveVerified publisher1.45.01 of 1See more

coredns jouve 1.45.0

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

Container imageDigestPackageFixed in
coredns/coredns:1.13.19b9128672209
stdlib@go1.25.2
1.26.9

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1,414
distributionjouveVerified publisher0.2.31 of 1See more

distribution jouve 0.2.3

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

Container imageDigestPackageFixed in
distribution/distribution:3.1.1bca24727f400
stdlib@go1.25.9
1.26.9

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1,269
etcd-defragjouveVerified publisher0.1.11 of 1See more

etcd-defrag jouve 0.1.1

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

Container imageDigestPackageFixed in
ghcr.io/ahrtr/etcd-defrag:v0.45.0b2a97f7fac6e
stdlib@go1.26.8
1.26.9

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251
api-key-managerjtektVerified publisher0.3.02 of 4See more

api-key-manager jtekt 0.3.0

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

Container imageDigestPackageFixed in
library/postgres:172d2b8998d310
stdlib@go1.24.6
1.26.9
public.ecr.aws/jtekt-corporation/api-key-manager-api:v0.1.175a48d987e0f
stdlib@go1.20.7
1.26.9

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7,945
image-storage-servicejtektVerified publisher0.5.11 of 4See more

image-storage-service jtekt 0.5.1

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

Container imageDigestPackageFixed in
bitnamilegacy/mongodb:6.0.10-debian-11-r842319decb591
stdlib@go1.19.12
1.26.9

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25,939

Container images carrying it

6,032 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.