Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Graylog versions 6.2.0 up to 6.2.4 and 6.3.0-alpha.1 up to 6.3.0-rc.2 are vulnerable to privilege escalation through API tokens. An attacker with a regular user account can send crafted requests to the REST API to create tokens for the local Administrator or other users whose IDs they know, gaining their privileges. Upgrade to 6.2.4 or 6.3.0-rc.2. Before upgrading, you can disable "Allow users to create personal access tokens" under System > Configuration > Users to limit token creation to administrators.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0061, the 49th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:10 UTC First seen by agentprime
- 31 Oct 2026, 15:10 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-3m86-c9x3-vwm9
- OSV: GHSA-3m86-c9x3-vwm9
- github.com/Graylog2/graylog2-server/security/advisories/GHSA-3m86-c9x3-vwm9
- nvd.nist.gov/vuln/detail/CVE-2025-53106
- github.com/Graylog2/graylog2-server/commit/6936bd16a783c2944a3d2f1e83902062520f90e3
- github.com/Graylog2/graylog2-server/commit/9215b8f1fd32566c31e6f7447ed864df3590c157
- github.com/Graylog2/graylog2-server