CVE-2026-55867

Description

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.

References

https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-j769-9gv9-65gr

https://github.com/Graylog2/graylog2-server/pull/26055

https://github.com/Graylog2/graylog2-server/pull/26053

https://github.com/Graylog2/graylog2-server/pull/26051

https://github.com/Graylog2/graylog2-server/pull/26049

https://github.com/Graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5

https://github.com/Graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc

https://github.com/Graylog2/graylog2-server/commit/4f280138b53dc3bbb5749213e8cb1c8e372f23a2

https://github.com/Graylog2/graylog2-server/commit/41d3745d0e52736d06c07d279ca0d72c1616df4c

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4