CVE-2026-54917 Details.
SeaweedFS <= 4.29 - Path Traversal File Write
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-54917. What It Means.
SeaweedFS versions through 4.29 build the S3 API and Iceberg REST catalog routers with mux.NewRouter().SkipClean(true), which disables URL path cleaning. A `..` segment in the request path therefore survives routing and reaches the handlers unnormalised, so a request such as `PUT /bucket-A/../evil-bucket/key` is matched as bucket=bucket-A with object=../evil-bucket/key. The captured object key is then joined into a filer path where the `..` is collapsed server-side, so the w…
Affected Product. What Is Hit.
- Vendor
- seaweedfs
- Product
- SeaweedFS
FAQ
Common Questions.
SeaweedFS <= 4.29 - Path Traversal File Write. SeaweedFS versions through 4.29 build the S3 API and Iceberg REST catalog routers with mux.NewRouter().SkipClean(true), which disables URL path cleaning. A `..` segment in the request path therefore survives routing and reaches the handlers unnormalised, so a request such as `PUT /bucket-A/../evil-bucket/key` is matched as bucket=bucket-A with object=../evil-bucket/key. The captured object key is then joined into a filer path where the `..` is collapsed server-side, so the w…
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-54917 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-54917 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update SeaweedFS to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-54917. Atlas does not run a check for it, so nothing here says whether a particular site is affected.