CVE-2026-12205
Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery
- State
- Published
- Severity
- 9.1 Critical
- Published
- Jun 15, 2026
- Updated
- Jun 16, 2026
- Reserved
- Jun 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | CISA-ADP |
Weaknesses
- CWE-323 Reusing a Nonce, Key Pair in Encryption
Affected Products
| Product | Versions |
|---|---|
Crypt::DSATIMLEGGE |
|
References
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