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CVE-2024-11734VulnerabilityPublished Updated

CVE-2024-11734: keycloak · Protection Mechanism Failure

Affects keycloakSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium : upgrade to 26.0.8 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.9% chance of exploitation in 30 days – higher than 60% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.0.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Jan 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 2026-10-26.

What to do

Upgrade org.keycloak/keycloak to 26.0.8.

Affected software

ProductAffectedFixed in
Mavenorg.keycloak/keycloakpkg:maven/org.keycloak/keycloakOther threatsAffected
  • =0
  • <26.0.8
Fixed in
  • 26.0.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released fixed versions of Keycloak (26.0.8) that address this vulnerability. Users should apply the update to these versions as soon as possible. The vendor advisory provides detailed instructions for applying the update. No additional mitigation is required beyond applying the official fix.

Description

A denial of service vulnerability was found in Keycloak that could allow an administrative user with the right to change realm settings to disrupt the service. This action is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that has already been terminated, leading to the failure of said request.

References

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