{"id":"CVE-2026-72921","state":"PUBLISHED","title":"SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths","description":"SeaweedFS is a distributed storage system. Prior to 4.24, the weed/server/filer_server_handlers.go allowed_prefixes authorization check used strings.HasPrefix on raw path strings, so a filer JWT scoped to /tenant1 also authorized sibling paths such as /tenant1234, /tenant1-old, and /tenant1backup, enabling cross-tenant reads and writes with a valid scoped token. This issue is fixed in version 4.24.","publishedAt":"2026-08-11T14:28:49.398Z","updatedAt":"2026-08-13T15:14:54.202Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["seaweedfs seaweedfs"],"affected":[{"vendor":"seaweedfs","product":"seaweedfs","versions":[{"version":"< 4.24","status":"affected"}]}],"references":["https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-gv5w-hfx8-8cwq","https://github.com/seaweedfs/seaweedfs/pull/9439","https://github.com/seaweedfs/seaweedfs/commit/05ed5c9ae8a2a45101b52b61d02f170d20d587ff","https://github.com/seaweedfs/seaweedfs/releases/tag/4.24"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72921.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72921","state":"PUBLISHED","datePublished":"2026-08-11T14:28:49.398Z","dateUpdated":"2026-08-13T15:14:54.202Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-10T17:57:26.144Z"},"containers":{"cna":{"title":"SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths","descriptions":[{"lang":"en","value":"SeaweedFS is a distributed storage system. Prior to 4.24, the weed/server/filer_server_handlers.go allowed_prefixes authorization check used strings.HasPrefix on raw path strings, so a filer JWT scoped to /tenant1 also authorized sibling paths such as /tenant1234, /tenant1-old, and /tenant1backup, enabling cross-tenant reads and writes with a valid scoped token. This issue is fixed in version 4.24."}],"affected":[{"vendor":"seaweedfs","product":"seaweedfs","versions":[{"version":"< 4.24","status":"affected"}]}],"references":[{"url":"https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-gv5w-hfx8-8cwq","name":"https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-gv5w-hfx8-8cwq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/seaweedfs/seaweedfs/pull/9439","name":"https://github.com/seaweedfs/seaweedfs/pull/9439","tags":["x_refsource_MISC"]},{"url":"https://github.com/seaweedfs/seaweedfs/commit/05ed5c9ae8a2a45101b52b61d02f170d20d587ff","name":"https://github.com/seaweedfs/seaweedfs/commit/05ed5c9ae8a2a45101b52b61d02f170d20d587ff","tags":["x_refsource_MISC"]},{"url":"https://github.com/seaweedfs/seaweedfs/releases/tag/4.24","name":"https://github.com/seaweedfs/seaweedfs/releases/tag/4.24","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-11T14:28:49.398Z"},"source":{"advisory":"GHSA-gv5w-hfx8-8cwq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T15:14:42.258989Z","id":"CVE-2026-72921","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-13T15:14:54.202Z"}}]}}}