Vulnerability Description
RustFS is a distributed object storage system built in Rust. From >= 1.0.0-alpha.1 to 1.0.0-alpha.79, invalid RPC signatures cause the server to log the shared HMAC secret (and expected signature), which exposes the secret to log readers and enables forged RPC calls. In crates/ecstore/src/rpc/http_auth.rs, the invalid signature branch logs sensitive data. This log line includes secret and expected_signature, both derived from the shared HMAC key. Any invalidly signed request triggers this path. The function is reachable from RPC and admin request handlers. This vulnerability is fixed in 1.0.0-alpha.80.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rustfs | Rustfs | 1.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/cPatch
- https://github.com/rustfs/rustfs/commit/6b2eebee1d07399ef02c0863bd515b4412a5a560Patch
- https://github.com/rustfs/rustfs/security/advisories/GHSA-333v-68xh-8mmqExploitVendor Advisory
FAQ
What is CVE-2026-22782?
CVE-2026-22782 is a vulnerability with a CVSS score of 7.5 (HIGH). RustFS is a distributed object storage system built in Rust. From >= 1.0.0-alpha.1 to 1.0.0-alpha.79, invalid RPC signatures cause the server to log the shared HMAC secret (and expected signature), wh...
How severe is CVE-2026-22782?
CVE-2026-22782 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-22782?
Check the references section above for vendor advisories and patch information. Affected products include: Rustfs Rustfs.