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CVE-2026-9689VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Open Source · Keycloak: Mehrere Schwachstellen

Affects Bundesamt für Sicherheit in der Informationstechnik Open SourceSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-9689· Medium 4.2

Not known to be exploited · CVSS 4.2 Medium · fixed in 26.6.3 : update Bundesamt für Sicherheit in der Informationstechnik Open Source when convenient.

Data as of 9 Nov 2026, 14:49 UTC

CVSS 3.1 base score
4.2Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 26.6.3
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat build of Keycloak 26.4Affected–Fixed in–
Red HatRed Hat build of Keycloak 26.4Affected–Fixed in–
Red HatRed Hat build of Keycloak 26.4.14Affected–Fixed in–
Red HatRed Hat build of Keycloak 26.6Affected–Fixed in–
Red HatRed Hat build of Keycloak 26.6Affected–Fixed in–
Red HatRed Hat build of Keycloak 26.6.5Affected–Fixed in–

AI-suggested

A fixed version of Keycloak is available in 26.6.3. Users should upgrade to Keycloak 26.6.3 or later to address these vulnerabilities. Before updating, back up existing installations including applications, configurations, and databases. No additional mitigations are specified beyond applying the official update.

Description

Keycloak, an open-source identity and access management solution, has multiple security vulnerabilities including a moderate severity HTTP parameter pollution flaw that can allow attackers to manipulate authentication when clients accept broad redirect URIs. Additional vulnerabilities fixed in version 26.6.3 address issues such as unauthorized token acquisition, privilege escalation, denial of service, information disclosure, and improper access control. These flaws could lead to unauthorized access, information leaks, and denial of service under certain conditions.

References

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