---
id: CVE-2026-93602
title: >-
  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
summary: >-
  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. At…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-299
  - CWE-295
vendor: rustls
product: webpki
affected:
  - webpki >= 0.102.0-alpha.0 < 0.103.10
  - webpki >= 0.104.0-alpha.1 < 0.104.0-alpha.5
patched:
  - rustls-webpki 0.103.10
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:25:55.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93602'
references:
  - url: 'https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass
    label: disclosure@vulncheck.com
  - url: 'https://crates.io/crates/rustls-webpki'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0049.html'
  - url: 'https://github.com/rustls/webpki'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93602.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93602'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2537991'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93602'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93602'
tags:
  - nvd
  - cve.org
  - osv
  - rust
  - csaf
  - vex
  - red-hat
epss: 0.00209
epssPercentile: 0.0985
aliases:
  - RUSTSEC-2026-0049
  - GHSA-pwjx-qhcg-rvj4
ecosystem: rust
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:58:04.007768Z'
ingestedAt: '2026-09-18T13:41:41.662Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-93602)

Affected packages:

- `rustls-webpki >= 0.102.0-alpha.0, < 0.103.10`

Patched in:

- `rustls-webpki 0.103.10`

Source: https://osv.dev/vulnerability/RUSTSEC-2026-0049

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Ansible Automation Orchestrator 2026, Confidential Cluster Operator, Confidential Compute Attestation, Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 8, OpenShift Lightspeed, … · no fix planned: Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 8, Red Hat Ansible Automation Platform 2, Red Hat Ansible Automation Platform Ansible Core 2, … · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93602.json)