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    CVE-2026-54917

    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.

    Published:Jun 25, 2026
    Last Modified:Jun 26, 2026
    EPS:Jun 25, 2026
    EPSS Score:
    CVSS Score:7.8

    Affected Products

    Vendor
    Seaweedfs
    Product
    Seaweedfs

    Exploits

    https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgvhttps://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgvhttps://github.com/BiiTts/CVE-2026-54917-SeaweedFS-Cross-Bucket-Traversal

    Related CVEs

    CVE-2026-77611 (CVSS 7.1) — SeaweedFS is a distributed storage system for files and blobs. In versions prior to 4.40, an authenticated S3 …
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    CVE-2026-77298 (CVSS 8.7) — SeaweedFS is a distributed storage system for files and blobs. In versions 4.39 and earlier, the S3 API accept…
    CVE-2026-77368 (CVSS 7.6) — SeaweedFS is a distributed storage system for files and blobs. In version 4.39, the filer's TUS resumable-uplo…
    CVE-2026-73080 (CVSS 9.3) — SeaweedFS is a distributed storage system. Prior to 4.24, VolumeServer.FetchAndWriteNeedle in weed/server/volu…
    CVE-2026-72921 (CVSS 8.1) — SeaweedFS is a distributed storage system. Prior to 4.24, the weed/server/filer_server_handlers.go allowed_pre…
    CVE-2026-72920 (CVSS 9.8) — SeaweedFS is a distributed storage system. Prior to 4.24, the filer registers the SeaweedIdentityAccessManagem…
    CVE-2026-55873 (CVSS 4.3) — SeaweedFS is a distributed storage system. In versions 4.08 through 4.33, requests signed with SigV4 service s…
    CVE-2026-55874 (CVSS 7.7) — SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segm…
    CVE-2026-58372 (CVSS 7.2) — SeaweedFS before 4.34 contains a path traversal vulnerability in the S3 gateway DeleteMultipleObjectsHandler t…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High