CVE-2026-12205 | BDVDB-2026-340247 Detail

Description#

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.

Impact#

Weaknesses#

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Exploit#

History#

1. Version 12026-06-15Record published in the CVE List.
2. Version 22026-06-16Most recent update recorded in the CVE List.