---
title: "CVE-2026-94418: WolfSSL - Authentication Bypass"
description: "WolfSSL with WOLFSSL_SMALL_CERT_VERIFY enabled contains a broken authentication caused by improper merging of certificate signature check results, letting attackers with crafted certificates bypass signature validation, exploit requires a verify callback that overrides date errors."
url: https://panop.io/threat-heartbeat/CVE-2026-94418/
---

# CVE-2026-94418 WolfSSL - Authentication Bypass

WolfSSL with WOLFSSL\_SMALL\_CERT\_VERIFY enabled contains a broken authentication caused by improper merging of certificate signature check results, letting attackers with crafted certificates bypass signature validation, exploit requires a verify callback that overrides date errors.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.09% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-94418)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Man In The Middle

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Published

27 September 2026

Updated

15 October 2026

Weakness

[CWE-347](https://cwe.mitre.org/data/definitions/347.html)

## Vendor fix

Disable WOLFSSL\_SMALL\_CERT\_VERIFY or update to a version where signature check merging is fixed; avoid using verify callbacks that override date errors.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-94418](https://nvd.nist.gov/vuln/detail/CVE-2026-94418)
- [https://github.com/wolfSSL/wolfssl/pull/11500](https://github.com/wolfSSL/wolfssl/pull/11500)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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