Graylog is a free and open log management platform

Overview

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/{userId}/tokens/{idOrToken} endpoint implemented by UsersResource.revokeToken() in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERS_TOKENREMOVE permission against the attacker-controlled userId path parameter before resolving the token selected by idOrToken. An authenticated user can provide an authorized userId while accessTokenService.loadById() or accessTokenService.load() resolves a token belonging to another user, including a service account or administrator, after which accessTokenService.destroy() deletes that token without checking AccessToken.getUserName(). The issue does not expose token contents, but unauthorized deletion causes integrity impact and can disrupt access-token-based integrations. This issue is fixed in versions 6.3.12, 7.0.7, and 7.1.2.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-55867)

Affected packages:

• org.graylog2:graylog2-server >= 6.2.0, < 6.3.12
• org.graylog2:graylog2-server >= 7.0.0, < 7.0.7
• org.graylog2:graylog2-server >= 7.1.0, < 7.1.2

Patched in:

• org.graylog2:graylog2-server 6.3.12
• org.graylog2:graylog2-server 7.0.7
• org.graylog2:graylog2-server 7.1.2

Source: https://github.com/advisories/GHSA-j769-9gv9-65gr