CVE Catalog

CVE-2026-27137

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.61%

47th percentile - higher than 47% of all known CVEs

Summary

When verifying a certificate chain containing a certificate with multiple email address constraints sharing common local parts but different domain parts, only the last constraint is considered, bypassing the others.

Risk Assessment

The organization may accept a certificate that does not satisfy all email address constraints, potentially leading to security policy violations and identity spoofing.

Recommendation

Update the certificate verification software to a version containing the fix for this vulnerability.

Related vulnerabilities

Original NVD description (English source)

When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS