{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zenc-lang:zen_c:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E084A39F-FF3F-487E-8E8A-F8F3C322A5AE",
              "versionEndExcluding": "0.4.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Zen C is a systems programming language that compiles to human-readable GNU C/C11. Prior to version 0.4.2, a command injection vulnerability (CWE-78) in the Zen C compiler allows local attackers to execute arbitrary shell commands by providing a specially crafted output filename via the `-o` command-line argument. The vulnerability existed in the `main` application logic (specifically in `src/main.c`), where the compiler constructed a shell command string to invoke the backend C compiler. This command string was built by concatenating various arguments, including the user-controlled output filename, and was subsequently executed using the `system()` function. Because `system()` invokes a shell to parse and execute the command, shell metacharacters within the output filename were interpreted by the shell, leading to arbitrary command execution. An attacker who can influence the command-line arguments passed to the `zc` compiler (like through a build script or a CI/CD pipeline configuration) can execute arbitrary commands with the privileges of the user running the compiler. The vulnerability has been fixed in version 0.4.2 by removing `system()` calls, implementing `ArgList`, and internal argument handling. Users are advised to update to Zen C version v0.4.2 or later."
    },
    {
      "lang": "es",
      "value": "Zen C es un lenguaje de programaci\u00f3n de sistemas que compila a GNU C/C11 legible por humanos. Antes de la versi\u00f3n 0.4.2, una vulnerabilidad de inyecci\u00f3n de comandos (CWE-78) en el compilador Zen C permite a atacantes locales ejecutar comandos de shell arbitrarios proporcionando un nombre de archivo de salida especialmente dise\u00f1ado a trav\u00e9s del argumento de l\u00ednea de comandos \u0027-o\u0027. La vulnerabilidad exist\u00eda en la l\u00f3gica de la aplicaci\u00f3n \u0027main\u0027 (espec\u00edficamente en \u0027src/main.c\u0027), donde el compilador constru\u00eda una cadena de comandos de shell para invocar al compilador C de backend. Esta cadena de comandos se constru\u00eda concatenando varios argumentos, incluyendo el nombre de archivo de salida controlado por el usuario, y posteriormente se ejecutaba usando la funci\u00f3n \u0027system()\u0027. Debido a que \u0027system()\u0027 invoca un shell para analizar y ejecutar el comando, los metacaracteres de shell dentro del nombre de archivo de salida eran interpretados por el shell, lo que llevaba a la ejecuci\u00f3n arbitraria de comandos. Un atacante que puede influir en los argumentos de l\u00ednea de comandos pasados al compilador \u0027zc\u0027 (como a trav\u00e9s de un script de compilaci\u00f3n o una configuraci\u00f3n de pipeline de CI/CD) puede ejecutar comandos arbitrarios con los privilegios del usuario que ejecuta el compilador. La vulnerabilidad ha sido corregida en la versi\u00f3n 0.4.2 eliminando las llamadas a \u0027system()\u0027, implementando \u0027ArgList\u0027 y el manejo interno de argumentos. Se aconseja a los usuarios actualizar a la versi\u00f3n v0.4.2 de Zen C o posterior."
    }
  ],
  "id": "CVE-2026-28207",
  "lastModified": "2026-05-01T14:38:16.460",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-26T23:16:35.277",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/z-libs/Zen-C/security/advisories/GHSA-9rff-x96h-76h2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://f0nduesav0yarde.github.io/blog/vulnerabilities/cve-2026-28207/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/z-libs/Zen-C/security/advisories/GHSA-9rff-x96h-76h2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}