{"api_version":"1","generated_at":"2026-06-16T22:05:11+00:00","cve":"CVE-2026-12205","urls":{"html":"https://cve.report/CVE-2026-12205","api":"https://cve.report/api/cve/CVE-2026-12205.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-12205","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-12205"},"summary":{"title":"Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery","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.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-06-15 23:16:43","updated_at":"2026-06-16 17:16:32"},"problem_types":["CWE-323","CWE-323 CWE-323 Reusing a Nonce, Key Pair in Encryption"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","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","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/15/4","name":"http://www.openwall.com/lists/oss-security/2026/06/15/4","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes","name":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47","name":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-12205","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12205","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"TIMLEGGE","product":"Crypt::DSA","version":"affected 1.21 custom","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-05-16T00:00:00.000Z","lang":"en","value":"Maintainer contacted"},{"source":"CNA","time":"2026-06-13T00:00:00.000Z","lang":"en","value":"Maintainer and CPANSec contacted"},{"source":"CNA","time":"2026-06-14T00:00:00.000Z","lang":"en","value":"Fixed version released"}],"solutions":[{"source":"CNA","title":"","value":"Upgrade to version 1.21\n\nRevoke any keys that may have been compromised.\n\nCrypt::DSA was deprecated in version 1.20. 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