CVE-2026-93602

Summary

rustls-webpki versions before 0.103.10 and 0.104.0-alpha.5 contain faulty CRL authority-matching logic that compares only the first distributionPoint against each CRL's IssuingDistributionPoint, ignoring additional distributionPoints. Attackers with a compromised trusted issuing authority can present revoked certificates that pass revocation checks under UnknownStatusPolicy::Allow, or cause incorrect errors under the default deny policy.

Affected Software

Weaknesses

• CWE-299: Improper Check for Certificate Revocation

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4
• https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass

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