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TI-2026-69627 Aliases CVE-2026-95208GHSA-vf9w-2hh8-xxhh

Improper certificate validation in wolfSSL allows denial of service

Priority LOW 38CWE-295Published · Updated

Key facts

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

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

Summary

wolfSSL versions 5.9.1 and 5.9.2 are affected. The ConfirmNameConstraints() function in wolfcrypt/src/asn.c mishandles name constraints in certificate authority certificates (CWE-295). A remote attacker without privileges can supply crafted Certificate Authority certificates, causing wolfSSL-based TLS clients to incorrectly reject valid certificates that lack a SAN, resulting in denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

An issue in the ConfirmNameConstraints() function (wolfcrypt/src/asn.c) of wolfSSL v5.9.1 and v5.9.2 allows attackers to cause a Denial of Service (DoS) via providing crafted Certificate Authority certificates, leading to valid certificates without SAN to be incorrectly rejected by wolfSSL-based TLS clients.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00172 6th percentileScored 2026-11-05
Fix No fix listed No fixed version in the sources yet

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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for wolfSSL.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-08 Threatist record created from CVE-2026-95208
  2. 2026-10-09 Alias added: GHSA-vf9w-2hh8-xxhh
  3. 2026-10-09 CVSS score added · CISA ADP
  4. 2026-10-09 Weakness changed · CISA ADP
  5. 2026-10-09 CISA SSVC decision points changed

References

Other 2

Sources

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