---
cve: "CVE-2026-89135"
severity: "MEDIUM"
cvss: 6.3
epss: "0.2%"
vendor: "wolfSSL"
kev: false
exploited: false
published: "2026-09-27 10:16:59"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-02T04:24:47+02:00"
---

# CVE-2026-89135

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **wolfSSL**
- State: PUBLISHED
- Stand: 2026-09-29 16:20:11
- CNA-CVSS: **6.3** (`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`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- ac01707f552c611fbd135cc723b2682b3e7f80f2 (Commit)

## Referenzen

- <https://github.com/wolfSSL/wolfssl/pull/11009>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-89135) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_