Security Advisory catalog CVE-2026-79651 Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory .
cve-program · CVE-2026-79651 Published
A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service responsible for authentication flows and theme management in Keycloak. The issue occurs because the system accepts arbitrary locale tags from unauthenticated requests and stores them in a permanent in-memory cache without limits. An attacker can exploit this by sending a large number of unique locale tags, eventually causing the server to run out of memory and crash.
Read the publisher's advisory Affected versions, risk and source history
cve-program · CVE-2026-79651 Published rhbk/keycloak-operator-bundle https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-operator-bundle",
"defaultStatus": "affected",
"versions": [
{
"version": "26.4.16-2",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} rhbk/keycloak-rhel9 https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-rhel9",
"defaultStatus": "affected",
"versions": [
{
"version": "26.4-26",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} rhbk/keycloak-rhel9-operator https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-rhel9-operator",
"defaultStatus": "affected",
"versions": [
{
"version": "26.4-26",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} keycloak/rhbk-openshift-rhel9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4.16",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "keycloak/rhbk-openshift-rhel9",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} keycloak-services https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4.16",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "keycloak-services",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} rhbk/keycloak-rhel9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.4.16",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "rhbk/keycloak-rhel9",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.4::el9"
]
} rhbk/keycloak-operator-bundle https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-operator-bundle",
"defaultStatus": "affected",
"versions": [
{
"version": "26.6.7-3",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} rhbk/keycloak-rhel9 https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-rhel9",
"defaultStatus": "affected",
"versions": [
{
"version": "26.6-20",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} rhbk/keycloak-rhel9-operator https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhbk/keycloak-rhel9-operator",
"defaultStatus": "affected",
"versions": [
{
"version": "26.6-20",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} keycloak/rhbk-openshift-rhel9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6.7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "keycloak/rhbk-openshift-rhel9",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} keycloak-services https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6.7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "keycloak-services",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} rhbk/keycloak-rhel9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat build of Keycloak 26.6.7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected",
"packageName": "rhbk/keycloak-rhel9",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} keycloak-services https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Single Sign-On 7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "keycloak-services",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7"
]
} Original source record · Cite this exact observation · Complete original publisher JSON