CVE-2026-89135 PUBLISHED

Failed X509_verify_cert leaves unverified CA in shared CertManager

Assigner: wolfSSL
Reserved: 10.09.2026 Published: 27.09.2026 Updated: 27.09.2026

A failed X509_verify_cert call permanently plants an unverified attacker CA in the shared CertManager, bypassing certificate validation in every type-blind sibling consumer (native TLS, OCSP, CRL, direct CM verify). This affects version 5.8.4 through 5.9.2 of wolfSSL with the macros (OPENSSL_EXTRA && !NO_CERTS && !WOLFCRYPT_ONLY) defined or built with --enable-opensslextra and the application is specifically making calls to the X509_verify_cert function.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	wolfSSL
Product	wolfSSL
Versions	Default: unaffected affected from 5.8.4 to 5.9.2 (incl.)

Credits

Christos Papakonstantinou (Cantina Security) finder

References

https://github.com/wolfSSL/wolfssl/pull/11009

Problem Types

CWE-295 Improper Certificate Validation CWE