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.
CVE-2026-76234
HIGHPre-NVD 7.57.5—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. a secondary CVSS source baseline 7.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(high)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 13%
- KEV
- Not listed
Published
August 19, 2026
Last Modified
August 20, 2026
Advisory Details (2)
Auto-updated Aug 19, 2026Patch available. Sources: github.
generic
libcrux before 0.0.6 Cryptographic Implementation Bug Fixes | Advisories | VulnCheck
https://www.vulncheck.com/advisories/libcrux-before-cryptographic-implementation-bug-fixesgithub Patch Available
Bug-Fixes in `libcrux-ecdh`, `libcrux-ed25519`, `libcrux-psq` · Advisory · celabshq/libcrux · GitHub
https://github.com/celabshq/libcrux/security/advisories/GHSA-435g-fcv3-8j26Vendor Advisories for CVE-2026-76234(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(3 across 1 ecosystem)
crates.io(3)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| libcrux-ecdh | — | 0.0.6 | — |
| libcrux-ed25519 | — | 0.0.6 | — |
| libcrux-psq | — | 0.0.7 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 12× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-21 05:50 UTCEG score recompute
- 2026-08-21 05:50 UTCGHSA enrichment
- 2026-08-20 22:56 UTCEPSS rescore
- 2026-08-20 16:38 UTCEG score recompute
- 2026-08-20 16:38 UTCGHSA enrichment
- 2026-08-20 15:45 UTCEG score recompute
- 2026-08-20 15:45 UTCGHSA enrichment
- 2026-08-20 03:39 UTCEG score recompute
- 2026-08-20 03:39 UTCGHSA enrichment
- 2026-08-19 14:26 UTCEG score recompute
- 2026-08-19 14:12 UTCEG score recompute
- 2026-08-19 14:12 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-347
Frequently asked(5)
What is CVE-2026-76234?
CVE-2026-76234 is a high vulnerability published on August 19, 2026. 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…
When was CVE-2026-76234 disclosed?
CVE-2026-76234 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76234 actively exploited?
CVE-2026-76234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.7% of all scored CVEs.
What is the CVSS score of CVE-2026-76234?
CVE-2026-76234 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-76234?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76234, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76234
Is Your Infrastructure Affected by CVE-2026-76234?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.