Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery_CVE-2026-12205

{
    "lastseen": "",
    "description": "Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery.\n\nCrypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it.\n\nThe first sign() on a Key object picks a nonce, and every later sign() on that same object reuses it, producing an identical \"r\".\n\nKeys used to sign more than once with an affected version should be considered compromised.",
    "published": "2026-06-15T21:57:18.317Z",
    "modified": "2026-06-16T16:13:32.533Z",
    "type": "cve",
    "title": "Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery",
    "source": "CPANSec",
    "references": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47\nhttps://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes",
    "id": "CVE-2026-12205",
    "bulletinFamily": "",
    "cwe": [
        "CWE-323"
    ],
    "cvelist": null,
    "sourceData": "TIMLEGGE Crypt::DSA 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Crypt::DSA",
    "version": "0",
    "vendor": "TIMLEGGE",
    "ai_description": "Reuse of nonce across signatures in Crypt::DSA before version 1.21 allows for private-key recovery",
    "ai_severity": "Critical",
    "ai_vendor": "TIMLEGGE",
    "ai_product": "Crypt::DSA",
    "ai_version": "before 1.21",
    "ai_score": 9.1
}