CVE-2026-6450: CRL critical extension bypass in ParseCRL_Extensions

Published Jun 25, 2026
·
Updated

A CRL critical extension bypass exists in ParseCRLExtensions 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 Software

2 affected components
OpenSSL ParseCRL_Extensions
wolfSSL wolfssl>=4.3.0<5.9.2

Event History

Jun 25, 2026
CVE Published
via MITRE·08:18 PM
Data Sourced
via MITRE·08:18 PM
DescriptionWeakness
Data Sourced
via NVD·09:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-6450?

The severity of CVE-2026-6450 is classified as low.

2

How do I fix CVE-2026-6450?

You can fix CVE-2026-6450 by applying the available patch.

3

What type of vulnerability is CVE-2026-6450?

CVE-2026-6450 is a CRL critical extension bypass vulnerability.

4

Which software is affected by CVE-2026-6450?

CVE-2026-6450 affects OpenSSL's ParseCRL_Extensions and wolfSSL.

5

When was CVE-2026-6450 published?

CVE-2026-6450 was published on June 25, 2026.

Contact

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CVE-2026-6450 - CRL critical extension bypass in ParseCRL_Extensions - SecAlerts