CVE-2026-73080 SeaweedFS: Unauthenticated SSRF with response read-back via VolumeServer.FetchAndWriteNeedle
Unauthenticated attackers can trigger Server-Side Request Forgery in SeaweedFS to access internal services and cloud metadata, exposing sensitive credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73080?
CVE-2026-73080 is a critical server-side request forgery vulnerability in seaweedfs, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SeaweedFS is a distributed storage system. Prior to 4.24, VolumeServer.FetchAndWriteNeedle in weed/server/volume_grpc_remote.go fetches a caller-supplied remote endpoint through weed/remote_storage/s3/s3_storage_client.go and writes the response into a needle. The RPC performs no authentication and no target validation, allowing anyone who can reach a volume server's gRPC port to cause requests to arbitrary hosts, including loopback, link-local, RFC 1918, and cloud metadata endpoints such as 169.254.169.254, and read the response. On cloud deployments, this can disclose instance metadata and IAM credentials and reach otherwise unexposed internal services. The volume server gRPC plane is unauthenticated by default, and configuring documented JWT signing keys does not protect this RPC. This issue is fixed in version 4.24.
Weakness: CWE-918
Which versions are affected by CVE-2026-73080?
4 open source packages ship an affected version, including github.com/seaweedfs/seaweedfs and seaweedfs.
| Package | Affected | Fixed in |
|---|---|---|
github.com/seaweedfs/seaweedfs Go | All versions | 0.0.0-20260512171120-69da20bdaec9 |
github.com/seaweedfs/seaweedfs Go | All versions | 0.0.0-20260512171120-69da20bdaec9 |
github.com/seaweedfs/seaweedfs Go | All versions | 0.0.0-20260512171120-69da20bdaec9 |
seaweedfs Bitnami | All versions | 4.24.0 |
How do I fix CVE-2026-73080?
Upgrade github.com/seaweedfs/seaweedfs to 0.0.0-20260512171120-69da20bdaec9 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-73080 being exploited?
There is no known exploitation of CVE-2026-73080 in the wild and no public exploit code.
Sources
Also known as BIT-seaweedfs-2026-73080, GHSA-87fv-vqqr-m4jr, GO-2026-6219, MINI-4rj9-c4f5-pfr2, MINI-999h-rh72-w2r4.