RUSTSEC-2026-0166 `pqcrypto-mldsa` is unmaintained: upstream PQClean project being archived
The pqcrypto-mldsa crate is unmaintained due to upstream archiving, requiring users to migrate to the ml-dsa crate to ensure continued security support.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is RUSTSEC-2026-0166?
RUSTSEC-2026-0166 is a vulnerability in pqcrypto-mldsa, published on 4 Jun 2026.
Official description
This crate provides Rust bindings to ML-DSA (FIPS 204) via C implementations from PQClean. The PQClean project is being archived in or after July 2026 (see PQClean/PQClean#604), after which no further security patches or bug fixes will be applied to the upstream implementations.
As a result, this crate will no longer receive updates. Users should migrate
to the ml-dsa crate, which provides a
pure-Rust implementation of ML-DSA (FIPS 204).
Which versions are affected by RUSTSEC-2026-0166?
1 open source package ship an affected version, including pqcrypto-mldsa.
| Package | Affected | Fixed in |
|---|---|---|
pqcrypto-mldsa crates.io | From 0.0.0-0 | None |
How do I fix RUSTSEC-2026-0166?
No fix has been published for RUSTSEC-2026-0166 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0166 being exploited?
There is no known exploitation of RUSTSEC-2026-0166 in the wild and no public exploit code.