---
cve: "CVE-2026-76234"
severity: "HIGH"
cvss: 8.7
epss: "0.2%"
vendor: "celabshq"
kev: false
exploited: false
published: "2026-08-19 14:17:52"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T12:33:40+02:00"
---

# CVE-2026-76234

> 8.7 HIGH · 🧪 PoC

## Beschreibung

libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- c5fb80f37530ee9b2df9501ae5ff8cb4a973a4bd (Commit)

## Referenzen

- <https://github.com/celabshq/libcrux/security/advisories/GHSA-435g-fcv3-8j26>
- <https://www.vulncheck.com/advisories/libcrux-before-cryptographic-implementation-bug-fixes>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-76234) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_