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.
History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-295
References
Metrics threat_severity

None

threat_severity

Moderate


Sat, 19 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Rustls
Rustls webpki
Vendors & Products Rustls
Rustls webpki

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Description 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.
Title rustls-webpki before 0.103.10 CRL Revocation Check Bypass
Weaknesses CWE-299
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-18T13:20:12.259Z

Updated: 2026-09-18T17:58:12.511Z

Reserved: 2026-09-18T11:00:32.756Z

Link: CVE-2026-93602

cve-icon Vulnrichment

Updated: 2026-09-18T17:58:08.871Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T14:19:11.850

Modified: 2026-09-22T20:25:55.870

Link: CVE-2026-93602

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-18T13:20:12Z

Links: CVE-2026-93602 - Bugzilla