Medium severity6.5NVD Advisory· Published Feb 18, 2026· Updated Jun 17, 2026
CVE-2026-1436
CVE-2026-1436
Description
Improper Access Control (IDOR) in the Graylog API, version 2.2.3, which occurs when modifying the user ID in the URL. An authenticated user can access other user's profiles without proper authorization checks. Exploiting this vulnerability allows valid users of the system to be listed and sensitive third-party information to be accessed, such as names, email addresses, internal identifiers, and last activity. The endpoint 'http://:12900/users/<my_user>' does not implement object-level authorization validations.
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Affected products
3- Range: 2.2.3
Patches
Vulnerability mechanics
References
1- www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylognvdThird Party Advisory
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