{"id":"CVE-2026-23517","aliases":["GHSA-4r5r-ccr6-q6f6","GO-2026-4334"],"url":"https://o3.security/vulnerability/CVE-2026-23517","summary":"Fleet has an Access Control vulnerability in debug/pprof endpoints","details":"### Summary\n\nA broken access control issue in Fleet allowed authenticated users to access debug and profiling endpoints regardless of role. As a result, low-privilege users could view internal server diagnostics and trigger resource-intensive profiling operations.\n\n### Impact\n\nFleet’s debug/pprof endpoints are accessible to any authenticated user regardless of role, including the lowest-privilege “Observer” role. This allows low-privilege users to access sensitive server internals, including runtime profiling data and in-memory application state, and to trigger CPU-intensive profiling operations that could lead to denial of service.\n\n### Patches\n\n- 4.78.3\n- 4.77.1\n- 4.76.2\n- 4.75.2\n- 4.53.3\n\n### Workarounds\n\nIf an immediate upgrade is not possible, users should put the debug/pprof endpoints behind an IP allowlist. \n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\nEmail us at [security@fleetdm.com](mailto:security@fleetdm.com)\nJoin #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)\n\n### Credits\n\nWe thank @secfox-ai for responsibly reporting this issue.","published":"2026-01-21T21:45:34.561Z","modified":"2026-10-28T02:30:30.379269671Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fleetdm/fleet","fixedVersion":"4.78.3"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet","fixedVersion":"4.77.1"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet","fixedVersion":"4.76.2"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet","fixedVersion":"4.75.2"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.78.3-0.20260112221730-5c030e32a3a9"}],"fix":{"url":"https://github.com/fleetdm/fleet/commit/5c030e32a3a9bc512355b5e1bf19636e4e6d0317","label":"fleetdm/fleet@5c030e3"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23517.json"},{"type":"ADVISORY","url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-4r5r-ccr6-q6f6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23517"},{"type":"FIX","url":"https://github.com/fleetdm/fleet/commit/5c030e32a3a9bc512355b5e1bf19636e4e6d0317"},{"type":"PACKAGE","url":"https://github.com/fleetdm/fleet"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-4334"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:30.379269671Z"}}