StackRadar

CVE-2026-55851

High

Advisory

Published 22 Jul 2026In the index since 6 Sept 2026
Severity
High
worst across findings
CVSS
8.7
base score, highest
EPSS
0.006
47th percentile
CISA KEV
Not listed
no confirmed exploitation
Charts affected
119
of 17,781 indexed, latest versions
Container images
115
deployed by those charts
Fix available
1 of 1
affected package

Netty: [codec-haproxy] Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion

Carried by container images the latest versions of 119 of 17,781 indexed charts deploy, on 115 images.

Affected packageAffected versionsFixed inImages
netty-codec-haproxymaven4.1.43.Final, 4.1.47.Final, 4.1.48.Final, 4.1.63.Final+38 more4.1.136.Final, 4.2.16.Final115
OSV records
GHSA-q6cq-mhr2-jmr5

Charts affected

119 by stars
ChartLatestAffected imagesRadar Score
seataseataVerified publisher0.1.01 of 1See more

seata seata 0.1.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
seataio/seata-server:latest703b5de7f1a6
netty-codec-haproxy@4.1.101.Final
4.1.136.Final

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4,245
keycloakself-hosters-by-nightVerified publisher0.1.11 of 1See more

keycloak self-hosters-by-night 0.1.1

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:26.60aae0de7fca8
netty-codec-haproxy@4.1.135.Final
4.1.136.Final

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518
shenyushenyu0.6.31 of 2See more

shenyu shenyu 0.6.3

1 of the 2 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
apache/shenyu-bootstrap:2.5.11bd5756f6273
netty-codec-haproxy@4.1.77.Final
4.1.136.Final

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8,804
showroom-docs-mcpshowroom-docs-mcpVerified publisher2.1.01 of 4See more

showroom-docs-mcp showroom-docs-mcp 2.1.0

1 of the 4 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/maximilianopizarro/showroom-docs-mcp:latest1a6eff92827a
netty-codec-haproxy@4.1.130.Final
4.1.136.Final

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5,201
keycloaksikalabs0.1.01 of 1See more

keycloak sikalabs 0.1.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:26.3.36a7217a100bd
netty-codec-haproxy@4.1.124.Final
4.1.136.Final

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1,690
simple-keycloaksikalabs0.1.01 of 1See more

simple-keycloak sikalabs 0.1.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:20.0.18830f76112b6
netty-codec-haproxy@4.1.82.Final
4.1.136.Final

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6,443
bootzookasoftwaremillVerified publisher0.2.11 of 2See more

bootzooka softwaremill 0.2.1

1 of the 2 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
softwaremill/bootzooka:latest845b5e8f8056
netty-codec-haproxy@4.2.13.Final
4.2.16.Final

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3,003
hazelcaststakaterVerified publisher1.0.21 of 1See more

hazelcast stakater 1.0.2

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
hazelcast/hazelcast:latestf086bf0ecb23
netty-codec-haproxy@4.1.132.Final
4.1.136.Final

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1,702
teku-validatorstakewise4.3.21 of 2See more

teku-validator stakewise 4.3.2

1 of the 2 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
consensys/teku:25.4.1bf6ecd2ea716
netty-codec-haproxy@4.1.118.Final
4.1.136.Final

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3,153
sn-consolestreamnative1.13.01 of 1See more

sn-console streamnative 1.13.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
streamnative/private-cloud-console:v2.3.27-all91e54375e154
netty-codec-haproxy@4.1.129.Final
4.1.136.Final

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1,827
wonder-mesh-netstrrl-helm2026.629.01 of 3See more

wonder-mesh-net strrl-helm 2026.629.0

1 of the 3 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:26.009a381c715ab
netty-codec-haproxy@4.1.111.Final
4.1.136.Final

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5,063
zipkin-gcpt3n1.0.01 of 1See more

zipkin-gcp t3n 1.0.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
openzipkin/zipkin-gcp:0.15.2b5d51d1144e2
netty-codec-haproxy@4.1.43.Final
4.1.136.Final

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4,538
hadoop-deploymenttejaswita-hadoop-helmchart1.0.01 of 1See more

hadoop-deployment tejaswita-hadoop-helmchart 1.0.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
apache/hadoop:3af361b20bec0
netty-codec-haproxy@4.1.89.Final
4.1.136.Final

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4,240
thingsboardthingsboardVerified publisher0.1.34 of 12See more

thingsboard thingsboard 0.1.3

4 of the 12 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
thingsboard/tb-coap-transport:3.4.1bd45a09d85d9
netty-codec-haproxy@4.1.75.Final
4.1.136.Final
thingsboard/tb-http-transport:3.4.1a06f53c5e2da
netty-codec-haproxy@4.1.75.Final
4.1.136.Final
thingsboard/tb-mqtt-transport:3.4.1030f316ce301
netty-codec-haproxy@4.1.75.Final
4.1.136.Final
thingsboard/tb-node:3.4.1645f43b688f7
netty-codec-haproxy@4.1.75.Final
4.1.136.Final

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25,394
opencloudunxwaresVerified publisher0.2.31 of 13See more

opencloud unxwares 0.2.3

1 of the 13 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:26.1.4044a457e0498
netty-codec-haproxy@4.1.118.Final
4.1.136.Final

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45,239
hazelcastwenerme5.10.21 of 2See more

hazelcast wenerme 5.10.2

1 of the 2 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
hazelcast/hazelcast:5.5.05dd5d31c7a06
netty-codec-haproxy@4.1.111.Final
4.1.136.Final

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2,634
keycloakwiremindVerified publisher25.3.11 of 2See more

keycloak wiremind 25.3.1

1 of the 2 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
ghcr.io/wiremind/bitnami/keycloak:26.5.0-debian-12-r38622ea9e43c0
netty-codec-haproxy@4.1.128.Final
4.1.136.Final

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7,624
zahori-processzahoriVerified publisher1.0.11 of 1See more

zahori-process zahori 1.0.1

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
zahoriaut/zahori-process:0.1.13351f8a220ed7
netty-codec-haproxy@4.1.94.Final
4.1.136.Final

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3,480
keycloakxzaks2.2.01 of 1See more

keycloakx zaks 2.2.0

1 of the 1 container images this version deploys carry CVE-2026-55851.

Container imageDigestPackageFixed in
quay.io/keycloak/keycloak:20.0.3b8f2a453a17a
netty-codec-haproxy@4.1.82.Final
4.1.136.Final

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6,016

Container images carrying it

115 by charts deploying them

A fixed version is listed for 1 of the 1 affected package.

Container imageDigestPackageFixed inUsed by
quay.io/keycloak/keycloak:24.0.34d6f22991266
netty-codec-haproxy@4.1.107.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:23.0.34f72a5b0c076
netty-codec-haproxy@4.1.100.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:26.3.36a7217a100bd
netty-codec-haproxy@4.1.124.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:20.0.18830f76112b6
netty-codec-haproxy@4.1.82.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:26.5.68d44614c7479
netty-codec-haproxy@4.1.130.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:26.49409c59bdfb6
netty-codec-haproxy@4.1.128.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:26.6.39b0330756022
netty-codec-haproxy@4.1.133.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:26.0.6a93d22e13b86
netty-codec-haproxy@4.1.111.Final
4.1.136.Final
1
quay.io/keycloak/keycloak:20.0.3b8f2a453a17a
netty-codec-haproxy@4.1.82.Final
4.1.136.Final
1
quay.io/keycloak/keycloak-operator:20.0.2b1710745fa64
netty-codec-haproxy@4.1.82.Final
4.1.136.Final
1
quay.io/maximilianopizarro/custom-rhcl-console:dns-prober-v0.1.21a592ee6651a
netty-codec-haproxy@4.1.132.Final
4.1.136.Final
1
quay.io/maximilianopizarro/neuralbank-backend:latesta53899fcfc01
netty-codec-haproxy@4.1.127.Final
4.1.136.Final
1
quay.io/maximilianopizarro/openshift-integration-operator:v0.8.2d6fc43ac802e
netty-codec-haproxy@4.1.133.Final
4.1.136.Final
1
quay.io/maximilianopizarro/showroom-docs-mcp:latest1a6eff92827a
netty-codec-haproxy@4.1.130.Final
4.1.136.Final
1
quay.io/microcks/microcks-operator:0.0.1196d1054d4a61
netty-codec-haproxy@4.1.128.Final
4.1.136.Final
1

syft 1.42.1 · advisories as of 14 Sept 2026

Corrections: contact@stackradar.io

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