CVE-2026-93602
rustls-webpki before 0.103.10 CRL Revocation Check Bypass
- State
- Published
- Severity
- 5.9 Medium
- Published
- Sep 18, 2026
- Updated
- Sep 18, 2026
- Reserved
- Sep 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.9 Medium | 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 | VulnCheck |
| 3.1 | 4.4 Medium | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N | VulnCheck |
Weaknesses
- CWE-299 Improper Check for Certificate Revocation
Affected Products
| Product | Versions |
|---|---|
webpkirustls |
|
References
- GitHub Security Advisory (GHSA-pwjx-qhcg-rvj4)vendor-advisory
- VulnCheck Advisory: rustls-webpki before 0.103.10 CRL Revocation Check Bypassthird-party-advisory
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