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Fencer Intel
critical 9.1

CVE-2026-113812 json

Mozilla::CA versions before 20261020 for Perl provide a CA certificate bundle containing a root linked to compromised intermediates

published 20d ago modified 10d ago also EUVD-2026-105771

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

Mozilla::CA versions before 20261020 for Perl provide a CA certificate bundle containing a root linked to compromised intermediates.

The bundle includes "emSign ECC Root CA - G3", which provides a trust path for intermediate certificates whose private keys are publicly available.

An attacker able to intercept or redirect client traffic may use these keys to impersonate a TLS server.

LWP, HTTP::Tiny and other clients normally use IO::Socket::SSL, which looks for CA certificates in OpenSSL's default locations before falling back to Mozilla::CA.

Configuration and environment variables can override this selection. Users should check which CA store their client uses. If it uses the system store, check for and install the operating system vendor's updates for this incident.

Patch / fix

  • cpan Mozilla-CA 20261020
  • perl-Mozilla-CA openSUSE Leap 16.0 20261020.0.0-bp160.1.1
  • perl-Mozilla-CA openSUSE Tumbleweed 20261020.0.0-1.1

opensuse advisories openSUSE-SU-2026:22207-1openSUSE-SU-2026:12250-1

Is CVE-2026-113812 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-113812 updated cvss 6.8

perl-mozilla-ca: Mozilla::CA: TLS server impersonation via compromised intermediate certificates

  • Red Hat Enterprise Linux 7 perl-Mozilla-CA 20231213-5.el10 Red Hat Enterprise Linux 8 perl-Mozilla-CA, perl-Mozilla-CA 20231213-5.el10 Red Hat Enterprise Linux 9 perl-Mozilla-CA 20231213-5.el10 Red Hat Enterprise Linux 10 perl-Mozilla-CA 20231213-5.el10 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

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
10d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • cpan Mozilla-CA

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel 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.