celabshq libcrux libcrux-ecdh/libcrux-ed25519/libcrux-psq signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in celabshq libcrux. This affects an unknown part of the component libcrux-ecdh/libcrux-ed25519/libcrux-psq. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2026-76234. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in celabshq libcrux (affected version unknown) and classified as problematic. This vulnerability affects an unknown functionality of the component libcrux-ecdh/libcrux-ed25519/libcrux-psq. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-76234 since 08/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/19/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/19/2026 Advisory disclosed
08/19/2026 +0 days CVE reserved
08/19/2026 +0 days VulDB entry created
08/24/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-76234 (🔒)
GCVE (CVE): GCVE-0-2026-76234
GCVE (VulDB): GCVE-100-393142

Entryinfo

Created: 08/19/2026 17:11
Updated: 08/24/2026 00:13
Changes: 08/19/2026 17:11 (73), 08/24/2026 00:13 (3)
Complete: 🔍
Cache ID: 216::103

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