CVE-2026-12205 — Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery
Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery. Crypt::DSA::sign caches the per-signature nonce material in the Ke…
Published: 2026-06-15 · CVSS: 9.1 · CVSS 3.1
Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery. Crypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it. The first sign() on a Key object picks a nonce, and every later sign() on that same object reuses it, producing an identical "r". Keys used to sign more than once with an affected version should be considered compromised.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7