{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.2.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7"
            }
          ],
          "repo": "https://github.com/sigstore/sigstore-js",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jfc7-64v2-mr8c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-347"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48758.json"
  },
  "details": "sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1.",
  "id": "CVE-2026-48758",
  "modified": "2026-07-17T03:41:52.978727559Z",
  "published": "2026-07-14T20:36:28.641Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48758.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48758"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sigstore/sigstore-js/pull/1657"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sigstore-js: DSSE payloadType type-binding failure"
}