CVE-2026-55873: Seaweedfs

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

SeaweedFS is a distributed storage system. In versions 4.08 through 4.33, requests signed with SigV4 service s3tables are routed to the S3Tables management API where authorization collapses account-less S3 identities into the shared admin account and fails open, allowing an authenticated low-privileged S3 user to enumerate administrator-owned table bucket names and ARNs. This issue is fixed in version 4.34.

Affected products

• Seaweedfs Seaweedfs: from 4.08, before 4.34 (fixed in 4.34)

Published 2026-07-08. Last modified 2026-07-08.