RUSTSEC-2026-0164 `pqcrypto` is unmaintained: upstream PQClean project being archived
The pqcrypto library is unmaintained due to upstream archival, requiring users to migrate to actively maintained alternatives to ensure security.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is RUSTSEC-2026-0164?
RUSTSEC-2026-0164 is a vulnerability in pqcrypto, published on 4 Jun 2026.
Official description
The pqcrypto crate and the entire pqcrypto-* ecosystem wrap 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, algorithm updates, or bug fixes will
be applied to the upstream implementations.
As a result, this crate and all dependent crates in the pqcrypto-* ecosystem
will no longer receive updates. Users should migrate to actively maintained
alternatives. Pure-Rust replacements are available for several algorithms:
Which versions are affected by RUSTSEC-2026-0164?
1 open source package ship an affected version, including pqcrypto.
| Package | Affected | Fixed in |
|---|---|---|
pqcrypto crates.io | From 0.0.0-0 | None |
How do I fix RUSTSEC-2026-0164?
No fix has been published for RUSTSEC-2026-0164 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0164 being exploited?
There is no known exploitation of RUSTSEC-2026-0164 in the wild and no public exploit code.