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TI-2026-69723 Aliases CVE-2026-67693GHSA-j75v-5pm7-3cg8

GnuTLS accepts end-entity certificates with contradictory key usage

Priority LOW 17CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

GnuTLS v3.8.13 does not reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU). The flaw is classified under CWE-367. A remote attacker with no privileges and no user interaction faces high attack complexity, with low confidentiality impact. The supplier does not consider this an actionable security vulnerability because its threat model excludes attacks that require modifying the trust boundary.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

GnuTLS v3.8.13 does not reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU). NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)" policy.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for GnuTLS. Red Hat gives the plan as none available for Red Hat Enterprise Linux 7, 8, 9 and 10, Red Hat Hardened Images, and Red Hat OpenShift Container Platform 4 and 5, and as no fix planned for Red Hat Enterprise Linux 6. Red Hat OpenShift AI (RHOAI) is also listed as affected without a fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Hardened ImagesAffectedNo fix yet
Red Hat OpenShift AI (RHOAI)Affected—
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Not affected: 1 product
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-67693
  2. 2026-10-09 CVSS score added · CISA ADP
  3. 2026-10-09 Weakness changed · CISA ADP
  4. 2026-10-09 CISA SSVC decision points changed
  5. 2026-10-09 Alias added: GHSA-j75v-5pm7-3cg8
  6. 2026-10-16 1 new reference · CNA
  7. 2026-10-19 CVSS score changed · CISA ADP
  8. 2026-10-19 CISA SSVC decision points changed
  9. 2026-10-30 Affected versions changed · Red Hat
  10. 2026-11-04 Title updated · CNA
  11. 2026-11-04 2 new references · CNA
  12. 2026-11-04 Title updated · CNA
  13. 2026-11-06 Affected versions changed · Red Hat

References

Other 5

Sources

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