VDB-340397 · CVE-2026-22705 · GHSA-hcp2-x6j4-29j7

RustCrypto signatures up to 0.1.0-rc.1 cryptographic primitive risky implementation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in RustCrypto signatures up to 0.1.0-rc.1. This affects an unknown part. The manipulation leads to cryptographic primitive risky implementation. This vulnerability is uniquely identified as CVE-2026-22705. The attack can only be initiated within the local network. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in RustCrypto signatures up to 0.1.0-rc.1. It has been rated as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a cryptographic primitive risky implementation vulnerability. Using CWE to declare the problem leads to CWE-1240. To fulfill the need for a cryptographic primitive, the product implements a cryptographic algorithm using a non-standard, unproven, or disallowed/non-compliant cryptographic implementation. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

RustCrypto: Signatures offers support for digital signatures, which provide authentication of data using public-key cryptography. Prior to version 0.1.0-rc.2, a timing side-channel was discovered in the Decompose algorithm which is used during ML-DSA signing to generate hints for the signature. This issue has been patched in version 0.1.0-rc.2.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-22705 since 01/08/2026. The exploitation is known to be difficult. The attack can only be done within the local network. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.1.0-rc.2 eliminates this vulnerability. Applying the patch 035d9eef98486ecd00a8bf418c7817eb14dd6558 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-1867). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

RustCrypto

Name

signatures

Version

License

open-source

Website

Product: https://github.com/RustCrypto/signatures/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (GitHub_M): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Cryptographic primitive risky implementation
CWE: CWE-1240 / CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: signatures 0.1.0-rc.2
Patch: 035d9eef98486ecd00a8bf418c7817eb14dd6558

Timelineinfo

01/08/2026 CVE reserved
01/10/2026 +2 days Advisory disclosed
01/10/2026 +0 days VulDB entry created
01/10/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-hcp2-x6j4-29j7
Status: Confirmed

CVE: CVE-2026-22705 (🔒)
GCVE (CVE): GCVE-0-2026-22705
GCVE (VulDB): GCVE-100-340397
EUVD: 🔒

Entryinfo

Created: 01/10/2026 10:30
Updated: 01/10/2026 23:43
Changes: 01/10/2026 10:30 (65), 01/10/2026 23:43 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.