CVE-2026-6450
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.
CSIRTS triage
- What
- The vulnerability allows for a critical extension bypass in ParseCRL_Extensions.
- Who is affected
- Deployments using the affected CRL parsing functionality.
- Urgency
- Remediation is medium due to the severity rating of 5.3.
- Action
- Apply the patch for CVE-2026-6450.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.
Advisory coverage (2)
- mediumCVE-2026-6450: A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not…nvd · 2026-06-25
- mediumCVE-2026-6450: CRL critical extension bypass in ParseCRL_Extensionsmsrc · 2026-06-09
External references
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