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CVE-2026-0976

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:887ab7c2b2212ca3e6cb53f8c3554011988e2807fa1745c4da3225d9c21407d8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","packageName":"org.keycloak/keycloak-quarkus-server","product":"Red Hat Build of Keycloak","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-app","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/5

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-deployment","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/3

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-deployment","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/6

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-app","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/2

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/4

{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/1

Affected products and versions

7 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","packageName":"org.keycloak/keycloak-quarkus-server","product":"Red Hat Build of Keycloak","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-app","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/5
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-deployment","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/3
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-deployment","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/6
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server-app","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/2
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/4
{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"keycloak-quarkus-server","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-20","description":"Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-0976"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/references/0
{"name":"RHBZ#2429869","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429869"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ece905bd1557cad28287116d9ef060a7ea80b890f5d21965c35fbe01294b9ae4 · sha256:bc9ac1ba74c34c91… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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