CVE-2026-28207

{"id": "CVE-2026-28207", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.3}]}, "published": "2026-02-26T23:16:35.277", "references": [{"url": "https://github.com/z-libs/Zen-C/security/advisories/GHSA-9rff-x96h-76h2", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://f0nduesav0yarde.github.io/blog/vulnerabilities/cve-2026-28207/", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/z-libs/Zen-C/security/advisories/GHSA-9rff-x96h-76h2", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}]}], "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 '-o'. La vulnerabilidad exist\u00eda en la l\u00f3gica de la aplicaci\u00f3n 'main' (espec\u00edficamente en 'src/main.c'), 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 'system()'. Debido a que 'system()' 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 'zc' (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 'system()', implementando 'ArgList' y el manejo interno de argumentos. Se aconseja a los usuarios actualizar a la versi\u00f3n v0.4.2 de Zen C o posterior."}], "lastModified": "2026-03-03T00:48:26.487", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:z-libs:zen_c:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1B2EF8B9-E9FC-47D0-9782-4A32EF144593", "versionEndExcluding": "0.4.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}