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CVE-2026-54917

Seaweedfs path traversal

10.0 CRITICALPublic exploitEPSS 1.64%
  1. Published25 Jun 2026

Description

SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With path cleaning disabled, a .. segment inside the URL survives routing, so a request such as `GET /bucket-A/../evil-bucket/key`, is matched as bucket=bucket-A, object=../evil-bucket/key. The captured object key is then joined into a filer path with util.JoinPath (S3) / path.Join (Iceberg), which collapse the .. server-side, so the actual read or write lands in evil-bucket. This vulnerability is fixed in 4.30.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected products

Seaweedfs< 4.30

Remediation

Fixed in
Seaweedfs≥ 4.30

References

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Frequently asked

Is CVE-2026-54917 being actively exploited?

CVE-2026-54917 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.64%.

How severe is CVE-2026-54917?

CVE-2026-54917 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 1.64% probability of exploitation.

Which products are affected by CVE-2026-54917?

Affected products include Seaweedfs.

How do I fix CVE-2026-54917?

Upgrade affected software to a fixed version, for example Seaweedfs 4.30 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.