CVE-2026-55873 SeaweedFS: Improper authorization in the S3Tables / Iceberg REST management API lets a low-privileged S3 user enumerate administrator-owned table buckets
Low-privileged S3 users can enumerate administrator-owned table buckets due to improper authorization in the S3Tables management API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55873?
CVE-2026-55873 is a medium-severity missing authorization vulnerability in seaweedfs, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-55873?
4 open source packages ship an affected version, including github.com/seaweedfs/seaweedfs and seaweedfs.
| Package | Affected | Fixed in |
|---|---|---|
github.com/seaweedfs/seaweedfs Go | From 0.0.0-20260128085517-09bb90e8dc16 | 0.0.0-20260614205536-b13463880c1f |
github.com/seaweedfs/seaweedfs Go | From 0.0.0-20260128085517-09bb90e8dc16 | 0.0.0-20260614205536-b13463880c1f |
github.com/seaweedfs/seaweedfs Go | From 0.0.0-20260128085517-09bb90e8dc16 | 0.0.0-20260614205536-b13463880c1f |
seaweedfs Bitnami | All versions | 4.34.0 |
How do I fix CVE-2026-55873?
Upgrade github.com/seaweedfs/seaweedfs to 0.0.0-20260614205536-b13463880c1f or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55873 being exploited?
There is no known exploitation of CVE-2026-55873 in the wild and no public exploit code.
Sources
Also known as BIT-seaweedfs-2026-55873, GHSA-hgpf-8634-g44c, GO-2026-6329, MINI-3fc5-7g54-5fc3, MINI-hw99-52g3-56qp.