{"schema_version":"1.7.3","id":"GHSA-4r5r-ccr6-q6f6","published":"2026-01-20T20:55:14Z","modified":"2026-02-28T06:26:16.513494Z","aliases":["CVE-2026-23517","GO-2026-4334"],"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.","affected":[{"package":{"name":"github.com/fleetdm/fleet","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.78.0"},{"fixed":"4.78.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4r5r-ccr6-q6f6/GHSA-4r5r-ccr6-q6f6.json"}},{"package":{"name":"github.com/fleetdm/fleet","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.77.0"},{"fixed":"4.77.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4r5r-ccr6-q6f6/GHSA-4r5r-ccr6-q6f6.json"}},{"package":{"name":"github.com/fleetdm/fleet","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.76.0"},{"fixed":"4.76.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4r5r-ccr6-q6f6/GHSA-4r5r-ccr6-q6f6.json"}},{"package":{"name":"github.com/fleetdm/fleet","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.75.0"},{"fixed":"4.75.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4r5r-ccr6-q6f6/GHSA-4r5r-ccr6-q6f6.json"}},{"package":{"name":"github.com/fleetdm/fleet/v4","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet/v4"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.78.3-0.20260112221730-5c030e32a3a9"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-4r5r-ccr6-q6f6/GHSA-4r5r-ccr6-q6f6.json"}}],"references":[{"type":"WEB","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":"WEB","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"}],"database_specific":{"cwe_ids":["CWE-862","CWE-863"],"github_reviewed":true,"github_reviewed_at":"2026-01-20T20:55:14Z","nvd_published_at":"2026-01-21T22:15:49Z","severity":"HIGH"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"}]}