SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths
Priority LOW 38CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00426 37th percentileScored 2026-11-07
Fix Fixed seaweedfs (seaweedfs): 4.24github.com/seaweedfs/seaweedfs (Go): 0.0.0-20260512171048-05ed5c9ae8a2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| seaweedfs | seaweedfs | before 4.24 | 4.24 | Patch available | CNA |
| — | github.com/seaweedfs/seaweedfs (Go) | before 0.0.0-20260512171048-05ed5c9ae8a2 | 0.0.0-20260512171048-05ed5c9ae8a2 | Patch available | GHSA-gv5w-hfx8-8cwq |
- seaweedfs Vendorseaweedfs Affected before 4.24 Fixed in 4.24 Patch available CNA
- github.com/seaweedfs/seaweedfs (Go) Vendor— Affected before 0.0.0-20260512171048-05ed5c9ae8a2 Fixed in 0.0.0-20260512171048-05ed5c9ae8a2 Patch available GHSA-gv5w-hfx8-8cwq
Remediation
- Fix · CNA seaweedfs (seaweedfs) Fixed in 4.24
- Fix · GHSA-gv5w-hfx8-8cwq github.com/seaweedfs/seaweedfs (Go) Fixed in 0.0.0-20260512171048-05ed5c9ae8a2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-72921
- 2026-10-03 Alias added: GHSA-gv5w-hfx8-8cwq
References
Other 5
- 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
- https://github.com/seaweedfs/seaweedfs
More seaweedfs vulnerabilities
- TI-2026-39686 SeaweedFS: Path traversal in the S3 and Iceberg REST gateways allows cross-bucket access CVSS 4.0HIGH 7.8
- TI-2026-53965 SeaweedFS: SFTP path ACL literal prefix match permits cross-tenant file read and overwrite CVSS 3.1HIGH 8.1
- TI-2024-26879 seaweedfs v3.68 was discovered to contain a SQL injection vulnerability via the component… CVSS 3.1MEDIUM 6.5
- TI-2026-42003 SeaweedFS < 4.34 - Cross-Bucket Object Deletion via DeleteObjects Request-Body Keys CVSS 4.0HIGH 7.2
- TI-2026-74336 Hard-coded SSH host key in SeaweedFS SFTP Helm chart CVSS 4.0HIGH 7.0
- TI-2026-54097 Incorrect authorization in seaweedfs CVSS 3.1HIGH 7.1
Sources
- CVE-2026-72921 · CVE Program
- CVE-2026-72921 · NVD
- FIRST EPSS
- GHSA-gv5w-hfx8-8cwq · GitHub Advisory Database · CC BY 4.0
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