CVE-2026-55874

highCVSS 7.7covered by 1 sourcefirst seen 2026-07-08

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.

⚡ Watch CVE-2026-55874

Get an email if CVE-2026-55874 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Exploitation outlook

Low exploitation risk0.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-55874: SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject d…nvd · 2026-07-08

External references

NVD record for CVE-2026-55874

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-55874 status](https://www.csirts.com/badge/CVE-2026-55874)](https://www.csirts.com/cve/CVE-2026-55874)