RUSTSEC-2026-0161 `pqcrypto-mlkem` is unmaintained: upstream PQClean project being archived
The pqcrypto-mlkem crate is unmaintained due to upstream archiving, requiring users to migrate to the ml-kem crate for 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-2026-0161?
RUSTSEC-2026-0161 is a vulnerability in pqcrypto-mlkem, published on 4 Jun 2026.
Official description
This crate provides Rust bindings to ML-KEM (FIPS 203) 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-kem crate, which provides a
pure-Rust implementation of ML-KEM (FIPS 203).
Which versions are affected by RUSTSEC-2026-0161?
1 open source package ship an affected version, including pqcrypto-mlkem.
| Package | Affected | Fixed in |
|---|---|---|
pqcrypto-mlkem crates.io | From 0.0.0-0 | None |
How do I fix RUSTSEC-2026-0161?
No fix has been published for RUSTSEC-2026-0161 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0161 being exploited?
There is no known exploitation of RUSTSEC-2026-0161 in the wild and no public exploit code.