rustls rustls-webpki up to 0.103.9/0.104.0-alpha.4 CRL Authority Matching certificate validation

Summaryinfo

A vulnerability, which was classified as problematic, has been found in rustls rustls-webpki up to 0.103.9/0.104.0-alpha.4. This issue affects some unknown processing of the component CRL Authority Matching. Performing a manipulation results in certificate validation. This vulnerability is cataloged as CVE-2026-93602. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in rustls rustls-webpki up to 0.103.9/0.104.0-alpha.4. It has been classified as problematic. This affects an unknown functionality of the component CRL Authority Matching. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-93602 since 09/18/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

Upgrading to version 0.103.10 or 0.104.0-alpha.5 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• rustls

Name

• rustls-webpki

Version

• 0.103.0
• 0.103.1
• 0.103.2
• 0.103.3
• 0.103.4
• 0.103.5
• 0.103.6
• 0.103.7
• 0.103.8
• 0.103.9
• 0.104.0-alpha.0
• 0.104.0-alpha.1
• 0.104.0-alpha.2
• 0.104.0-alpha.3
• 0.104.0-alpha.4

CPE 2.3info

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CPE 2.2info

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