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TI-2026-78537 Aliases CVE-2026-113812GHSA-h2xv-9jg2-5v55

Mozilla::CA for Perl trusts a root linked to compromised intermediates

Priority MEDIUM 45CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-295.

Summary

Mozilla::CA for Perl versions before 20261020 ship a CA certificate bundle that includes the root emSign ECC Root CA - G3, which provides a trust path for intermediate certificates whose private keys are publicly available. This is an improper certificate validation issue (CWE-295). An attacker able to intercept or redirect client traffic can use these keys to impersonate a TLS server.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00339 27th percentileScored 2026-11-07
Fix Fixed Mozilla-CA: 20261020

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Mozilla-CAbefore 2026102020261020Patch availableCNA
  • Mozilla-CA Vendor— Affected before 20261020 Fixed in 20261020 Patch available CNA

Remediation

Update Mozilla-CA to version 20261020, the fixed version. Check which CA store your client uses, and if it uses the system store, install the operating system vendor's updates for this incident.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Mozilla-CA Fixed in 20261020

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-113812
  2. 2026-10-21 Alias added: GHSA-h2xv-9jg2-5v55
  3. 2026-10-21 Affected versions changed · Red Hat
  4. 2026-10-21 CVSS score added · Red Hat
  5. 2026-10-21 Affected versions changed · Red Hat
  6. 2026-10-21 CVSS score changed · Red Hat
  7. 2026-10-30 CVSS score added · CISA ADP
  8. 2026-10-30 CISA SSVC decision points changed
  9. 2026-10-30 Priority changed: LOW → MEDIUM
  10. 2026-10-30 Affected versions changed · Red Hat

References

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences