Vulnerability-Lookup

CVE-2026-93602 (GCVE-0-2026-93602)

Vulnerability from cvelistv5 – Published: 2026-09-18 13:20 – Updated: 2026-09-18 17:58

Title

rustls-webpki before 0.103.10 CRL Revocation Check Bypass

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. 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.

Severity

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

4.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 17:58 UTC

CWE

CWE-299 - Improper Check for Certificate Revocation

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 7342 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/rustls/webpki/security/advisor…	vendor-advisory
https://www.vulncheck.com/advisories/rustls-webpk…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
rustls	webpki	Affected: 0.102.0-alpha.0 , < 0.103.10 (semver) Affected: 0.104.0-alpha.1 , < 0.104.0-alpha.5 (semver)	guessed

Date Public

2026-03-20 00:00

Credits

1seal

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-93602

Vulnerability from fkie_nvd - Published: 2026-09-18 14:19 - Updated: 2026-09-22 20:25

Severity

4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    }
  ],
  "id": "CVE-2026-93602",
  "lastModified": "2026-09-22T20:25:55.870",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-93602",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-18T17:58:04.007768Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-18T14:19:11.850",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-299"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-8HRM-P5H4-6VCX

Vulnerability from github – Published: 2026-09-18 15:32 – Updated: 2026-09-18 15:32

Details

Severity

4.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-93602"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-299"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-18T14:19:11Z",
    "severity": "MODERATE"
  },
  "details": "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\u0027s 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.",
  "id": "GHSA-8hrm-p5h4-6vcx",
  "modified": "2026-09-18T15:32:18Z",
  "published": "2026-09-18T15:32:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93602"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.10-crl-revocation-check-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

MSRC_CVE-2026-93602

Vulnerability from csaf_microsoft - Published: 2026-09-25 01:03 - Updated: 2026-11-02 01:45

Summary

rustls-webpki before 0.103.10 CRL Revocation Check Bypass

Scope

1 vulnerability in this advisory, including CVE-2026-93602.

CVE-2026-93602

4.4 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Fixed: 2 products Known affected: 4 products Known not affected: 2 products

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OPENSUSE-SU-2026:11936-1

Vulnerability from csaf_opensuse - Published: 2026-09-30 00:00 - Updated: 2026-10-01 10:23

Summary

python313-tokenizers-0.23.2-1.1 on GA media

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 8 products

Open the full advisory

OPENSUSE-SU-2026:21982-1

Vulnerability from csaf_opensuse - Published: 2026-09-30 17:58 - Updated: 2026-10-01 16:39

Summary

Security update for sccache

Severity

Important

Scope

19 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2026:22016-1

Vulnerability from csaf_opensuse - Published: 2026-10-02 19:31 - Updated: 2026-10-03 16:17

Summary

Security update for rustup

Severity

Important

Scope

16 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 2 products

Open the full advisory

OPENSUSE-SU-2026:22175-1

Vulnerability from csaf_opensuse - Published: 2026-10-27 13:57 - Updated: 2026-10-31 17:19

Summary

Security update for aws-nitro-enclaves-cli

Severity

Important

Scope

4 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 6 products

Open the full advisory

OPENSUSE-SU-2026:22189-1

Vulnerability from csaf_opensuse - Published: 2026-10-26 16:52 - Updated: 2026-10-31 17:19

Summary

Security update for shadowsocks-rust, shadowsocks-libev

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 21 products

Open the full advisory

RUSTSEC-2026-0049 (CVE-2026-93602)

Vulnerability from osv_rustsec – Published: 2026-03-20 12:00 – Updated: 2026-09-19 08:42 – Source website

Summary

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 distributionPoints would be ignored.

The impact was that correctly 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.

This vulnerability is identified as GHSA-pwjx-qhcg-rvj4. Thank you to @1seal for the report.

References

URL

Type

	https://crates.io/crates/rustls-webpki	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2026-0049.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "privilege-escalation"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "rustls-webpki",
        "purl": "pkg:cargo/rustls-webpki"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.102.0-alpha.0"
            },
            {
              "fixed": "0.103.10"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2026-93602",
    "GHSA-pwjx-qhcg-rvj4"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "If a certificate had more than one `distributionPoint`, then only the first `distributionPoint` would be considered against each CRL\u0027s `IssuingDistributionPoint` `distributionPoint`, and then the certificate\u0027s subsequent `distributionPoint`s would be ignored.\n\nThe impact was that correctly 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.\n\nThis vulnerability is identified as [GHSA-pwjx-qhcg-rvj4](https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4). Thank you to [@1seal](https://github.com/1seal) for the report.",
  "id": "RUSTSEC-2026-0049",
  "modified": "2026-09-19T08:42:27Z",
  "published": "2026-03-20T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/rustls-webpki"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0049.html"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "CRLs not considered authoritative by Distribution Point due to faulty matching logic"
}

SUSE-SU-2026:23983-1

Vulnerability from csaf_suse - Published: 2026-09-30 17:49 - Updated: 2026-10-05 16:59

Summary

Security update for sccache

Severity

Important

Scope

19 vulnerabilities in this advisory, including CVE-2026-93602.

CVE-2026-93602

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Recommended: 8 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-93602 (GCVE-0-2026-93602)

RUSTSEC-2026-0049 (CVE-2026-93602)

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