{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-12205: Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-12205","status":"final","version":"1","initial_release_date":"2026-06-15T21:57:18.317Z","current_release_date":"2026-06-16T16:13:32.533Z","revision_history":[{"date":"2026-06-15T21:57:18.317Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-12205 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-12205"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-12205"},{"category":"external","summary":"metacpan.org","url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47"},{"category":"external","summary":"metacpan.org","url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes"}]},"product_tree":{"branches":[{"category":"vendor","name":"TIMLEGGE","branches":[{"category":"product_name","name":"Crypt::DSA","branches":[{"category":"product_version_range","name":"<1.21","product":{"name":"TIMLEGGE Crypt::DSA <1.21","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:timlegge:crypt\\:\\:dsa:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-12205","title":"Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"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"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 1.21.","product_ids":["CSAFPID-1"]}]}]}