GHSA-435g-fcv3-8j26
Bug-Fixes in `libcrux-ecdh`, `libcrux-ed25519`, `libcrux-psq`
Blast Radius
libcrux-ecdh🦀libcrux-ed25519🦀libcrux-psqReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
In accordance with our security policy for libcrux, we publish a GitHub security advisory for any releases whose CHANGELOG includes bug-fixes, and encourage our users to upgrade. The latest releases of the libcrux-ecdh, libcrux-ed25519 and libcrux-psq crates contain the following bug-fixes:
libcrux-ecdh
- #1301: Check length and clamping in X25519 secret validation. This is a breaking change since errors are now raised on unclamped X25519 secrets or inputs of the wrong length
libcrux-ed25519
- #1320: Remove duplicated clamping step during key generation
The issue fixed in #1320 was first reported by Nadim Kobeissi.
libcrux-psq
- #1319: Propagate AEADError instead of panicking
- #1301: Fix broken clamping check for imported X25519 secret keys
The issue fixed in #1319 was first reported by Nadim Kobeissi.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | libcrux-ecdh | all versions | 0.0.6 |
| 🦀crates.io | libcrux-ed25519 | all versions | 0.0.6 |
| 🦀crates.io | libcrux-psq | all versions | 0.0.7 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for libcrux-ecdh. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update libcrux-ecdh to 0.0.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-435g-fcv3-8j26 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-435g-fcv3-8j26 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-435g-fcv3-8j26. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-435g-fcv3-8j26 in your dependencies?
O3 detects GHSA-435g-fcv3-8j26 across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.