Security Advisory catalog CVE-2026-18212
cve-program · CVE-2026-18212 Published
A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.
Read the publisher's advisory Affected versions, risk and source history
cve-program · CVE-2026-18212 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-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-openshift-rhel9/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": "rhbk-openshift-rhel9/rhbk-openshift-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-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/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/rhbk-keycloak-rhel9",
"cpes": [
"cpe:/a:redhat:build_keycloak:26.6::el9"
]
} rhbk-openshift-rhel9/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": "rhbk-openshift-rhel9/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 Data Grid 8",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "keycloak-services",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:jboss_data_grid:8"
]
} keycloak-services https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
"collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
"packageName": "keycloak-services",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:jbosseapxp"
]
} 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": "affected",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7"
]
} Original source record · Cite this exact observation · Complete original publisher JSON