What is CVE-2026-12205?

CVE-2026-12205 is a critical-severity vulnerability in Timlegge Crypt::dsa, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 9.1/10. Published 2026-06-15.

How severe is CVE-2026-12205?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Timlegge Crypt::dsa

CVE-2026-12205

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…

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Timlegge Crypt::dsa — versions 0

Weakness classification (CWE)

CWE-323 — Reusing a Nonce, Key Pair in Encryption

References

9b29abf9-4ab0-4765-b253-1875cd9b441e
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-12205?: CVE-2026-12205 is a critical-severity vulnerability in Timlegge Crypt::dsa, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 9.1/10. Published 2026-06-15.
How severe is CVE-2026-12205?: Critical severity. CVSS v3 base score is 9.1 out of 10.