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

6.4 / 10

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Basic Information

ID CVE-2026-22705

Source GitHub_M

Published Jan 10, 2026 at 06:14

Affected Product

Vendor RustCrypto

Product signatures

Version < 0.1.0-rc.2

Affected Versions RustCrypto signatures < 0.1.0-rc.2

CWE Classification

CWE-1240

References

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    "lastseen": "",
    "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.",
    "published": "2026-01-10T06:14:20.292Z",
    "modified": "2026-01-10T06:14:20.292Z",
    "type": "cve",
    "title": "RustCrypto: Signatures has timing side-channel in ML-DSA decomposition",
    "source": "GitHub_M",
    "references": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-hcp2-x6j4-29j7\nhttps://github.com/RustCrypto/signatures/pull/1144\nhttps://github.com/RustCrypto/signatures/commit/035d9eef98486ecd00a8bf418c7817eb14dd6558",
    "id": "CVE-2026-22705",
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    "cwe": [
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    "cvelist": null,
    "sourceData": "RustCrypto signatures < 0.1.0-rc.2",
    "sourceHref": "",
    "cvss": {
        "score": 6.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "signatures",
    "version": "< 0.1.0-rc.2",
    "vendor": "RustCrypto",
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}