CVE-2026-48758

{
  "id": "CVE-2026-48758",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-14T21:17:01.113",
  "lastModified": "2026-10-24T21:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "sigstore-js proporciona bibliotecas JavaScript para interactuar con los servicios Sigstore. Antes de la 3.2.1, la función preAuthEncoding en @sigstore/core utiliza la codificación ascii de Node.js al convertir la cadena PAE a bytes, permitiendo que payloadType sea mutado después de la firma sin invalidar la firma y rompiendo la garantía de vinculación de tipo que DSSE está diseñado para proporcionar. Este problema está solucionado en la versión 3.2.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "sigstore",
          "product": "sigstore-js",
          "versions": [
            {
              "version": "< 3.2.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-15T12:54:43.124124Z",
          "id": "CVE-2026-48758",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/pull/1657",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}