CVE-2026-1436
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2Description
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://<IP>:12900/users/<my_user>' does not implement object-level authorization validations.
Analysis
Graylog 2.2.3 contains an insecure direct object reference (IDOR) vulnerability in its user API endpoint that allows authenticated users to enumerate and access other users' profiles by manipulating user IDs in requests. An attacker with valid credentials can extract sensitive information including usernames, email addresses, internal identifiers, and last activity timestamps from arbitrary user accounts. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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