What’s Vulnerable › Vulnerabilities

CVE-2026-22705: RustCrypto: Signatures has timing side-channel in ML-DSA decomposition

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-10 · updated 2026-06-17
• Weakness: CWE-1240

Description

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.

Affected products

• RustCrypto signatures: before 0.1.0-rc.2

References

• https://github.com/RustCrypto/signatures/commit/035d9eef98486ecd00a8bf418c7817eb14dd6558
• https://github.com/RustCrypto/signatures/pull/1144
• https://github.com/RustCrypto/signatures/security/advisories/GHSA-hcp2-x6j4-29j7

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