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CVE-2026-45793

Estado: Pendiente de análisisAlta (7.5)—

Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\IO\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_<id>_<base64url-JWT> format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Composer expone credenciales en logs públicos de CI al fallar validación de tokens GitHub; la red sin autenticación puede obtenerlas via logs o stderr (CWE-200: información sensible expuesta).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningUser TrainingRestrict File and Directory PermissionsPrivileged Account ManagementPassword PoliciesNetwork Segmentation

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Composer — ComposerAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-45793",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45793",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-15T18:11:02.102503Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "composer",
          "product": "composer",
          "versions": [
            {
              "status": "affected",
              "version": ">= 1.0, < 1.10.28"
            },
            {
              "status": "affected",
              "version": ">= 2.0.0, < 2.2.28"
            },
            {
              "status": "affected",
              "version": ">= 2.3.0, < 2.9.8"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-07-15T17:16:48.173",
  "references": [
    {
      "url": "https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/pull/12853",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/pull/12855",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/releases/tag/1.10.28",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/releases/tag/2.2.28",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/releases/tag/2.9.8",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\\IO\\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_<id>_<base64url-JWT> format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8."
    }
  ],
  "lastModified": "2026-07-15T20:54:43.733",
  "sourceIdentifier": "security-advisories@github.com"
}