# CVE-2026-12205

## Summary

- **CVE ID:** CVE-2026-12205
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-323
- **Published:** Jun 15, 2026
- **Last Modified:** Jun 16, 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.

## Affected Products

- TIMLEGGE — Crypt::DSA (0)

## References

- [CNA](https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.20/source/lib/Crypt/DSA.pm#L47)
- [CNA](https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/changes)
- [CVE](http://www.openwall.com/lists/oss-security/2026/06/15/4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._