{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.101.0"
              },
              {
                "fixed": "0.103.12"
              },
              {
                "introduced": "0.104.0-alpha.1"
              },
              {
                "fixed": "0.104.0-alpha.6"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "05e736fd927e3b0c28bb5b24b2bed684b32e1485"
            },
            {
              "fixed": "27131d476e2b68a537e629d6d012bef8dad6efd3"
            },
            {
              "introduced": "5a23b7e1c7b6e898d6bb437730a029b2695aa3eb"
            },
            {
              "fixed": "2c2d56b2090127d555d6d9b910d2a9e288259e54"
            }
          ],
          "repo": "https://github.com/rustls/webpki",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xgp8-3hg3-c2mh"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93601.json"
  },
  "details": "rustls-webpki (the Rust webpki fork used by rustls) versions \u003e= 0.101.0 and prior to 0.103.12 and 0.104.0-alpha.6 incorrectly accepted permitted-subtree DNS name constraints for certificates asserting a wildcard name. For example, a name constraint of accept.example.com was treated as satisfied by a certificate for *.example.com, which could feasibly assert reject.example.com — a name outside the permitted subtree. Because name constraints are restrictions applied to otherwise properly issued certificates, the issue is only reachable after signature verification succeeds and requires a misissued wildcard certificate to exploit.",
  "id": "CVE-2026-93601",
  "modified": "2026-09-20T11:31:01.780080527Z",
  "published": "2026-09-18T13:20:11.571Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93601.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rustls/webpki/security/advisories/GHSA-xgp8-3hg3-c2mh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93601"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/rustls-webpki-0.101.0-before-0.103.12-name-constraint-bypass"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "rustls webpki 0.101.0 before 0.103.12 Name Constraint Bypass"
}