CVE-2026-45040 RustFS: Sensitive Information Leakage (SessionToken and SecretAccessKey) in RustFS Logs [Debug Mode]
Attackers with log access can steal credentials when RustFS runs in debug mode, exposing SessionTokens and SecretAccessKeys in plaintext logs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45040?
CVE-2026-45040 is a medium-severity vulnerability in rustfs, published on 28 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, RustFS suffers from sensitive information leakage in log outputs. When the server is run with RUST_LOG=debug sensitive credentials including SessionToken (JWT), SecretAccessKey, and full JWT claims are printed in plaintext to the server logs. This vulnerability is fixed in 1.0.0-beta.2.
Which versions are affected by CVE-2026-45040?
How do I fix CVE-2026-45040?
No fix has been published for CVE-2026-45040 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45040 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45040 exists.
Sources
Also known as GHSA-8cm2-h255-v749.