CVE-2026-26331

{"id": "CVE-2026-26331", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2026-02-24T03:16:01.710", "references": [{"url": "https://github.com/yt-dlp/yt-dlp/commit/1fbbe29b99dc61375bf6d786f824d9fcf6ea9c1a", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2026.02.21", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-g3gw-q23r-pgqm", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "yt-dlp is a command-line audio/video downloader. Starting in version 2023.06.21 and prior to version 2026.02.21, when yt-dlp's `--netrc-cmd` command-line option (or `netrc_cmd` Python API parameter) is used, an attacker could achieve arbitrary command injection on the user's system with a maliciously crafted URL. yt-dlp maintainers assume the impact of this vulnerability to be high for anyone who uses `--netrc-cmd` in their command/configuration or `netrc_cmd` in their Python scripts. Even though the maliciously crafted URL itself will look very suspicious to many users, it would be trivial for a maliciously crafted webpage with an inconspicuous URL to covertly exploit this vulnerability via HTTP redirect. Users without `--netrc-cmd` in their arguments or `netrc_cmd` in their scripts are unaffected. No evidence has been found of this exploit being used in the wild. yt-dlp version 2026.02.21 fixes this issue by validating all netrc \"machine\" values and raising an error upon unexpected input. As a workaround, users who are unable to upgrade should avoid using the `--netrc-cmd` command-line option (or `netrc_cmd` Python API parameter), or they should at least not pass a placeholder (`{}`) in their `--netrc-cmd` argument."}, {"lang": "es", "value": "yt-dlp es un descargador de audio/v\u00eddeo de l\u00ednea de comandos. A partir de la versi\u00f3n 2023.06.21 y antes de la versi\u00f3n 2026.02.21, cuando se utiliza la opci\u00f3n de l\u00ednea de comandos '--netrc-cmd' de yt-dlp (o el par\u00e1metro de API de Python 'netrc_cmd'), un atacante podr\u00eda lograr una inyecci\u00f3n de comandos arbitraria en el sistema del usuario con una URL creada maliciosamente. Los encargados del mantenimiento de yt-dlp asumen que el impacto de esta vulnerabilidad es alto para cualquiera que use '--netrc-cmd' en su comando/configuraci\u00f3n o 'netrc_cmd' en sus scripts de Python. Aunque la URL creada maliciosamente en s\u00ed parecer\u00e1 muy sospechosa para muchos usuarios, ser\u00eda trivial explotar encubiertamente esta vulnerabilidad a trav\u00e9s de una redirecci\u00f3n HTTP para una p\u00e1gina web creada maliciosamente con una URL discreta . Los usuarios sin '--netrc-cmd' en sus argumentos o 'netrc_cmd' en sus scripts no se ven afectados. No se ha encontrado evidencia de que este exploit se est\u00e9 utilizando. La versi\u00f3n 2026.02.21 de yt-dlp soluciona este problema validando todos los valores de 'machine' de netrc y generando un error ante una entrada inesperada. Como soluci\u00f3n alternativa, los usuarios que no puedan actualizarse deben evitar usar la opci\u00f3n de l\u00ednea de comandos '--netrc-cmd' (o el par\u00e1metro de API de Python 'netrc_cmd'), o al menos no deben pasar un marcador de posici\u00f3n ('{}') en su argumento '--netrc-cmd'."}], "lastModified": "2026-02-25T19:32:30.417", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:yt-dlp_project:yt-dlp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "12B9D4B5-A1FA-4317-A911-DF469B09D3D5", "versionEndExcluding": "2026.02.21", "versionStartIncluding": "2023.06.21"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}