Skip to content
Fencer Vulns
high 7.5

CVE-2026-6659 json

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts

published 2026-05-08 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-28809

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

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.

Patch / fix

  • libcrypt-passwdmd5-perl Debian 14 1.44-1

debian advisories DEBIAN-CVE-2026-6659

  • perl-Crypt-PasswdMD5 openSUSE Leap 16.0 1.430.0-bp160.1.1
  • perl-Crypt-PasswdMD5 openSUSE Tumbleweed 1.430.0-1.1

opensuse advisories openSUSE-SU-2026:21137-1openSUSE-SU-2026:11000-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-6659 updated cvss 6.1

Crypt::PasswdMD5: Perl: Crypt::PasswdMD5: Weak cryptographic salts due to predictable random number generation

  • Red Hat Enterprise Linux 6 perl, perl-CGI, perl-core, perl-CPAN, perl-libs, perl-parent, +39 more Red Hat Enterprise Linux 7 perl, perl-core, perl-CPAN, perl-libs, perl-tests, perl-macros, +11 more Red Hat Enterprise Linux 8 perl, perl-IO, perl-libs, perl-open, perl-Test, perl-Errno, +19 more Red Hat Enterprise Linux 9 perl, perl-B, perl-if, perl-IO, perl-ph, perl-lib, +92 more Red Hat Enterprise Linux 10 perl Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • RSAVAGE Crypt::PasswdMD5

Classification

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

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.