CVE-2026-22782

high-risk

Published 2026-01-16

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.

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Rustfs

Affected Vendors

Rustfs

References (3)

Patch https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/c...

Patch https://github.com/rustfs/rustfs/commit/6b2eebee1d07399ef02c0863bd515b4412a5a560

Exploit https://github.com/rustfs/rustfs/security/advisories/GHSA-333v-68xh-8mmq

/ 100

high-risk

Severity 26/34 · High

Exploitability 0/34 · Minimal

Exposure 28/34 · Critical