---
id: CVE-2026-89135
title: >-
  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)
summary: >-
  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 …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-295
vendor: wolfssl
product: wolfssl
affected:
  - 'wolfssl >= 5.8.4, <= 5.9.2'
published: '2026-09-27'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T18:57:29.083'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89135'
references:
  - url: 'https://github.com/wolfSSL/wolfssl/pull/11009'
    label: facts@wolfssl.com
tags:
  - nvd
  - cve.org
epss: 0.00112
epssPercentile: 0.0134
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-29T16:18:37.143503Z'
scores:
  nvd: 6.5
  cna: 6.3
ingestedAt: '2026-09-27T09:45:46.032Z'
---

## Overview

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.

## Affected

- `wolfssl >= 5.8.4, <= 5.9.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.