Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-72921SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths

High 8.1

In plain English

A high-severity incorrect authorization in seaweedfs from seaweedfs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.4%top 62.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260512171048-05ed5c9ae8a2	GHSA-gv5w-hfx8-8cwq
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260512171048-05ed5c9ae8a2	GO-2026-6361

Affected products (as reported)

Vendor	Product	Versions
seaweedfs	seaweedfs	< 4.24

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-gv5w-hfx8-8cwq x_refsource_CONFIRM
https://github.com/seaweedfs/seaweedfs/pull/9439 x_refsource_MISC
https://github.com/seaweedfs/seaweedfs/commit/05ed5c9ae8a2a45101b52b61d02f170d20d587ff x_refsource_MISC
https://github.com/seaweedfs/seaweedfs/releases/tag/4.24 x_refsource_MISC