CVE-2026-41256

{
  "id": "CVE-2026-41256",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-11T18:16:33.983",
  "lastModified": "2026-10-26T18:10:00.173",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "jq is a command-line JSON processor. In 1.8.1 and earlier, Top-level jq programs loaded from a file with -f are truncated at the first embedded NUL byte on current upstream HEAD. A crafted filter file such as . followed by \\x00 and arbitrary suffix compiles and executes as only the prefix before the NUL. This leaves jq with a post-CVE-2026-33948 prefix/full-buffer mismatch on the compilation path even though the JSON parser path has already been fixed."
    },
    {
      "lang": "es",
      "value": "jq es un procesador JSON de línea de comandos. En la versión 1.8.1 y anteriores, los programas jq de nivel superior cargados desde un archivo con -f se truncan en el primer byte NUL incrustado en la HEAD actual del repositorio principal. Un archivo de filtro manipulado, como . seguido de \\x00 y un sufijo arbitrario, se compila y ejecuta como solo el prefijo antes del NUL. Esto deja a jq con una discrepancia entre el prefijo y el búfer completo posterior a CVE-2026-33948 en la ruta de compilación, a pesar de que la ruta del analizador JSON ya ha sido corregida."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "jqlang",
          "product": "jq",
          "versions": [
            {
              "version": "<= 1.8.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-11T20:12:56.609851Z",
          "id": "CVE-2026-41256",
          "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-158"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "1.8.1",
              "matchCriteriaId": "2026D0D9-8A88-43D4-9995-CF7928D9FFB8"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/jqlang/jq/security/advisories/GHSA-vf2h-chrj-q3fg",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/jqlang/jq/security/advisories/GHSA-vf2h-chrj-q3fg",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}