What is CVE-2026-6659?

CVE-2026-6659 is a high-severity vulnerability in Rsavage Crypt::passwdmd5, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.5/10. Published 2026-05-08.

How severe is CVE-2026-6659?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Rsavage Crypt::passwdmd5

CVE-2026-6659

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

EPSS: 0.000 (3.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Rsavage Crypt::passwdmd5 — versions 0

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

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

Frequently asked questions

What is CVE-2026-6659?: CVE-2026-6659 is a high-severity vulnerability in Rsavage Crypt::passwdmd5, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.5/10. Published 2026-05-08.
How severe is CVE-2026-6659?: High severity. CVSS v3 base score is 7.5 out of 10.