# Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens Advisory record · `GHSA-j769-9gv9-65gr` - **Identifiers:** `GHSA-j769-9gv9-65gr` · `CVE-2026-55867` - **State:** Confirmed - **Severity:** CVSS 5.3 Medium - **Critical:** No - **Weakness (CWE):** [CWE-639](https://cwe.mitre.org/data/definitions/639.html) - **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) - **Published:** 28 Aug 2026 - **Updated:** 28 Aug 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 28 Aug 2026, 22:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `org.graylog2:graylog2-server` (Maven): affected `>=6.2.0, <6.3.12 || >=7.0.0, <7.0.7 || >=7.1.0, <7.1.2`; fixed in `6.3.12`, `7.0.7`, `7.1.2` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Graylog versions from 6.2.0 before 6.3.12, from 7.0.0 before 7.0.7, and from 7.1.0 before 7.1.2 are affected. An authenticated user who knows or can guess a valid token identifier can delete other users' access tokens, including service account and administrator tokens, though token contents are not exposed. Upgrade to Graylog 6.3.12, 7.0.7, 7.1.2 or later; no workaround is available. Written 2 Nov 2026. ## 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 - 5.3 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N`, from CNA (GitHub_M) - **CISA KEV:** Not listed. - **EPSS:** 0.0056, the 47th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 14:19 UTC: First seen by agentprime - 31 Oct 2026, 14:19 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-j769-9gv9-65gr) ## Sources - [GitHub Advisory Database: GHSA-j769-9gv9-65gr](https://github.com/advisories/GHSA-j769-9gv9-65gr) - [OSV: GHSA-j769-9gv9-65gr](https://osv.dev/vulnerability/GHSA-j769-9gv9-65gr) - - - - - - - - - - Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code. ## Check whether this affects you A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet. - With the agentprime MCP server (), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .