What’s Vulnerable › Vulnerabilities
CVE-2026-6450: CRL critical extension bypass in ParseCRL_Extensions
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-25 · updated 2026-06-27
- Weakness: CWE-295
Description
A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.
Affected products
- wolfSSL: from 4.3.0 before 5.9.2 — fixed in 5.9.2
How to fix
Upgrade to a fixed version: wolfSSL 5.9.2. Check the vendor advisory for mitigations.
References
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