CVE-2026-93602CWE-299

CVE-2026-93602

Medium · published September 18, 2026

CVSS v3.1
4.4
EPSS
0%
Percentile
9.4
In the wild
Unconfirmed
What it 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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
5.9 · 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
EPSS
0.00200 · 9.4th percentile
Weakness
CWE-299 · Improper Check for Certificate Revocation
Published
2026-09-18T18:19Z
References (2)
https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4 · [email protected]https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass · [email protected]
EPSS history
Timeline
  • 20 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 18 SEP 13:20Z
    rustls-webpki before 0.103.10 CRL Revocation Check Bypass
    cvelistv5