openwall.com
http://www.openwall.com/lists/oss-security/2026/06/15/4 CVE-2026-12205
CRITICAL
Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery
Record summary
CVE-2026-12205 has a selected CVSS score of 9.1 (critical).
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableYes
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Jun 16, 2026 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
Crypt::DSABrowse TIMLEGGE / Crypt::DSADefault status: unaffected | CVE List | Before 1.21 | affected |
References
4metacpan.org
https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm metacpan.orgrelease notes
https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-12205