CVE-2026-22705 RustCrypto: Signatures has timing side-channel in ML-DSA decomposition
A timing side-channel in the ML-DSA decomposition algorithm allows attackers to potentially recover private keys from RustCrypto Signatures users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-22705?
CVE-2026-22705 is a medium-severity vulnerability in RustCrypto signatures, published on 10 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
RustCrypto: Signatures offers support for digital signatures, which provide authentication of data using public-key cryptography. Prior to version 0.1.0-rc.2, a timing side-channel was discovered in the Decompose algorithm which is used during ML-DSA signing to generate hints for the signature. This issue has been patched in version 0.1.0-rc.2.
Weakness: CWE-1240
Which versions are affected by CVE-2026-22705?
3 open source packages ship an affected version, including ml-dsa.
| Package | Affected | Fixed in |
|---|---|---|
ml-dsa crates.io | All versions | 0.1.0-rc.3 |
ml-dsa crates.io | All versions | 0.1.0-rc.3 |
ml-dsa crates.io | From 0.0.0-0 | 0.1.0-rc.3 |
How do I fix CVE-2026-22705?
Upgrade ml-dsa to 0.1.0-rc.3 or later.
Is CVE-2026-22705 being exploited?
There is no known exploitation of CVE-2026-22705 in the wild and no public exploit code.
Sources
Also known as GHSA-hcp2-x6j4-29j7, RUSTSEC-2025-0144.