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GHSA-gv3v-2cpp-3pmq

MediumCVSS 5 / 10
Published Feb 10, 2026·Last modified Apr 9, 2026
Affected Components(1)
Maven logoorg.keycloak/keycloak-quarkus-server
< 26.5.6
Description

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

Patches are available, see:

  • https://github.com/keycloak/keycloak/releases/tag/26.4.11
  • https://github.com/keycloak/keycloak/releases/tag/26.5.6
  • https://github.com/keycloak/keycloak/releases/tag/26.6.0
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Risk Scores
Base Score
5.0

The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
4.6

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2025-11537
    Alias
  • EUVD-2025-207355
    Alias

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