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Vulnerability · Published May 8, 2026 · Assigned by CPANSec

CVE-2026-6659Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts

High 7.5

In plain English

A high-severity security flaw in Crypt::PasswdMD5 from RSAVAGE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 61.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libcrypt-passwdmd5-perlno fix listedDEBIAN-CVE-2026-6659
Debian:13libcrypt-passwdmd5-perlno fix listedDEBIAN-CVE-2026-6659
Debian:14libcrypt-passwdmd5-perl1.44-1DEBIAN-CVE-2026-6659
Ubuntu:22.04:LTSlibcrypt-passwdmd5-perlno fix listedUBUNTU-CVE-2026-6659
Ubuntu:24.04:LTSlibcrypt-passwdmd5-perlno fix listedUBUNTU-CVE-2026-6659
Ubuntu:25.10libcrypt-passwdmd5-perlno fix listedUBUNTU-CVE-2026-6659
Ubuntu:26.04:LTSlibcrypt-passwdmd5-perlno fix listedUBUNTU-CVE-2026-6659
Ubuntu:26.10libcrypt-passwdmd5-perlno fix listedUBUNTU-CVE-2026-6659

Affected products (as reported)

VendorProductVersions
RSAVAGE Crypt::PasswdMD5 0 – through 1.42

Weakness: CWE-338 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References