GHSA-pwjx-qhcg-rvj4: webpki CRLs Not Considered Authoritative By Vulnerability

MODERATE
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CVSS 4.4
CWE-299
Published
Advisory Summary

GHSA-pwjx-qhcg-rvj4 is a MODERATE (CVSS 4.4) crls not considered authoritative by vulnerability (CWE-299: Improper Check for Certificate Revocation) affecting webpki libraries in the crates.io ecosystem. The issue involves crls not considered authoritative by distribution point due to faulty matching logic. Remediation is available by upgrading affected packages to version 0.103.10, 0.104.0-alpha.5.

GHSA-pwjx-qhcg-rvj4 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-pwjx-qhcg-rvj4
Severity MODERATE
CVSS v3.1 Base Score 4.4
CWE Classification CWE-299: Improper Check for Certificate Revocation
Affected Product webpki
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 4.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix GHSA-pwjx-qhcg-rvj4

To remediate this vulnerability, upgrade all affected webpki dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

rustls-webpki fixed: 0.103.10 
Upgrade rustls-webpki to 0.103.10
rustls-webpki fixed: 0.104.0-alpha.5 
Upgrade rustls-webpki to 0.104.0-alpha.5
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for rustls-webpki

How to Check if You Are Affected

To determine whether your application is affected by GHSA-pwjx-qhcg-rvj4, inspect your project dependencies for webpki:

inspect dependencies for rustls-webpki

Analyze the terminal output to locate any version of webpki in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.103.10), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-299: Improper Check for Certificate Revocation, where the product does not check or incorrectly checks the revocation status of a certificate, which may cause it to use a certificate that has been compromised. In webpki, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

If a certificate had more than one `distributionPoint`, then only the first `distributionPoint` would be considered against each CRL's `IssuingDistributionPoint` `distributionPoint`, and then the certificate's subsequent `distributionPoint`s would be ignored. The impact was that correct provided CRLs would not be consulted to check revocation. With `UnknownStatusPolicy::Deny` (the default) this would lead to incorrect but safe `Error::UnknownRevocationStatus`. With `UnknownStatusPolicy::Allow` this would lead to inappropriate acceptance of revoked certificates. This vulnerability is thought to be of limited impact. This is because both the certificate and CRL are signed -- an attacker would need to compromise a trusted issuing authority to trigger this bug. An attacker with such capabilities could likely bypass revocation checking through other more impactful means (such as publishing a valid, empty CRL.) More likely, this bug would be latent in normal use, and an attacker could leverage faulty revocation checking to continue using a revoked credential.

GHSA-pwjx-qhcg-rvj4 Affected webpki Versions

2 component(s)
Fixed Versions:
0.103.100.104.0-alpha.5
Product / Package Ecosystem Affected Versions Fixed Version
rustls-webpki
 crates.io
≥ 0.102.0-alpha.0
< 0.103.10
0.103.10
rustls-webpki
 crates.io
≥ 0.104.0-alpha.1
< 0.104.0-alpha.5
0.104.0-alpha.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4
webpki Source Repository REPOSITORY
https://github.com/rustls/webpki
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2026-0049.html

Frequently Asked Questions

What is GHSA-pwjx-qhcg-rvj4?
GHSA-pwjx-qhcg-rvj4 is a security vulnerability in webpki involving CRLs not considered authoritative by Distribution Point due to faulty matching logic under CWE-299: Improper Check for Certificate Revocation.
Which webpki versions are affected?
Affected versions include releases prior to 0.103.10, 0.104.0-alpha.5 across affected packages: rustls-webpki.
What version fixes GHSA-pwjx-qhcg-rvj4?
Upgrading to 0.103.10, 0.104.0-alpha.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rustls-webpki affected?
Yes, rustls-webpki is affected in releases prior to 0.103.10, 0.104.0-alpha.5. Upgrade your dependency to 0.103.10, 0.104.0-alpha.5 or later.
What is the CVSS score of GHSA-pwjx-qhcg-rvj4?
GHSA-pwjx-qhcg-rvj4 has a CVSS v3.1 base score of 4.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with GHSA-pwjx-qhcg-rvj4?
GHSA-pwjx-qhcg-rvj4 is classified under CWE-299: Improper Check for Certificate Revocation (The product does not check or incorrectly checks the revocation status of a certificate, which may cause it to use a certificate that has been compromised.).
How can I check crates.io dependencies for GHSA-pwjx-qhcg-rvj4?
Run the dependency tree command: 'inspect dependencies for rustls-webpki'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pwjx-qhcg-rvj4",
  "modified" : "2026-03-25T19:56:38Z",
  "published" : "2026-03-20T21:51:17Z",
  "aliases" : [ ],
  "summary" : "webpki: CRLs not considered authoritative by Distribution Point due to faulty matching logic",
  "details" : "If a certificate had more than one `distributionPoint`, then only the first `distributionPoint` would be considered against each CRL's `IssuingDistributionPoint` `distributionPoint`, and then the certificate's subsequent `distributionPoint`s would be ignored.\n\nThe impact was that correct provided CRLs would not be consulted to check revocation. With `UnknownStatusPolicy::Deny` (the default) this would lead to incorrect but safe `Error::UnknownRevocationStatus`. With `UnknownStatusPolicy::Allow` this would lead to inappropriate acceptance of revoked certificates.\n\nThis vulnerability is thought to be of limited impact. This is because both the certificate and CRL are signed -- an attacker would need to compromise a trusted issuing authority to trigger this bug.  An attacker with such capabilities could likely bypass revocation checking through other more impactful means (such as publishing a valid, empty CRL.)\n\nMore likely, this bug would be latent in normal use, and an attacker could leverage faulty revocation checking to continue using a revoked credential.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "rustls-webpki"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.102.0-alpha.0"
      }, {
        "fixed" : "0.103.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "rustls-webpki"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.104.0-alpha.1"
      }, {
        "fixed" : "0.104.0-alpha.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rustls/webpki"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2026-0049.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-299" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-20T21:51:17Z",
    "nvd_published_at" : null
  }
}