Is CVE-2026-55873 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-55873?

CVE-2026-55873 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-55873

Description

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.