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.
CVE-2026-93602
MEDIUMPre-NVD 4.44.4—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.4 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 4.4; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 4.4Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.4
- EG Score
- 4.4(high)
- EG Risk
- 20(Track)EG Risk 20/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity44% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 18, 2026
Advisory Details (2)
Auto-updated Sep 18, 2026Patch available. Sources: github.
generic
rustls-webpki before 0.103.10 CRL Revocation Check Bypass | Advisories | VulnCheck
https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypassgithub Patch Available
CRLs not considered authoritative by Distribution Point due to faulty matching logic · Advisory · rustls/webpki · GitHub
https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4Vendor Advisories for CVE-2026-93602(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 18:29 UTCEG score recompute
- 2026-09-18 18:29 UTCGHSA enrichment
- 2026-09-18 18:15 UTCEG score recompute
- 2026-09-18 18:14 UTCGHSA enrichment
- 2026-09-18 14:21 UTCEG score recompute
- 2026-09-18 13:29 UTCEG score recompute
- 2026-09-18 13:29 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-93602?
CVE-2026-93602 is a medium vulnerability published on September 18, 2026. 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…
When was CVE-2026-93602 disclosed?
CVE-2026-93602 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-93602?
CVE-2026-93602 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-93602?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93602, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-93602
Is Your Infrastructure Affected by CVE-2026-93602?
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