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Vulnerability record · CVE-2026-55874 · published 8 July 2026

CVE-2026-55874: Path traversal vulnerability

SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.

7.7 CVSS 3.1 High EPSS 0.61% · top 53.1% CWE-22 · Path traversal Deferred
7.7CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
8 Jul 2026Last modified by NVD

Description

SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

LinkTags
https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd
https://github.com/seaweedfs/seaweedfs/pull/9929
https://github.com/seaweedfs/seaweedfs/releases/tag/4.34
https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-56wq-x3wv-3ff4

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Source: NIST National Vulnerability Database (record CVE-2026-55874), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.