CVE-2026-113812

Received Received - Intake

Mozilla::CA Certificate Bundle Compromise Before 20261020

Publication date: 2026-10-20

Last updated on: 2026-10-30

Assigner: CPANSec

Description

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.

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Meta Information

Published

2026-10-20

Last Modified

2026-10-30

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-113812

EUVD

EUVD-2026-105771

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	ca	to 20261020 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

Mozilla::CA versions before 20261020 for Perl include a compromised CA certificate bundle. The bundle contains a root CA linked to intermediates with publicly available private keys. Attackers can exploit this to impersonate TLS servers if they intercept or redirect client traffic.

Detection Guidance

Check if your system uses Mozilla::CA by inspecting Perl modules and environment variables. Run 'perl -Mozilla::CA -e "print Mozilla::CA::SSL_ca_file()"' to verify the CA bundle path. Inspect client configurations to confirm if they rely on Mozilla::CA or system stores.

Impact Analysis

If your Perl-based client uses Mozilla::CA and relies on its certificate bundle, an attacker could intercept your traffic and impersonate trusted servers. This may lead to data theft or unauthorized access. Check which CA store your client uses and verify if it is affected.

Compliance Impact

This vulnerability may impact compliance with GDPR and HIPAA by enabling attackers to impersonate TLS servers, potentially exposing sensitive data during transmission. Compromised certificates could allow unauthorized access to protected information, violating encryption requirements under these regulations.

Mitigation Strategies

Update Mozilla::CA to version 20261020 or later. If using system CA stores, install vendor updates. Configure clients to use updated CA bundles and verify trust paths. Disable overrides that force use of vulnerable bundles.

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