RUSTSEC-2026-0165 `pqcrypto-falcon` is unmaintained: upstream PQClean project being archived
The pqcrypto-falcon crate is unmaintained due to upstream archival, requiring users to migrate to the fn-dsa crate to ensure continued security support.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is RUSTSEC-2026-0165?
RUSTSEC-2026-0165 is a vulnerability in pqcrypto-falcon, published on 4 Jun 2026.
Official description
This crate provides Rust bindings to the Falcon (FN-DSA) signature scheme 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 fn-dsa crate, which provides a
pure-Rust implementation of FN-DSA (FIPS 206).
Which versions are affected by RUSTSEC-2026-0165?
1 open source package ship an affected version, including pqcrypto-falcon.
| Package | Affected | Fixed in |
|---|---|---|
pqcrypto-falcon crates.io | From 0.0.0-0 | None |
How do I fix RUSTSEC-2026-0165?
No fix has been published for RUSTSEC-2026-0165 yet. Limit exposure of the affected software until one is available.
Is RUSTSEC-2026-0165 being exploited?
There is no known exploitation of RUSTSEC-2026-0165 in the wild and no public exploit code.