CVE-2026-26331

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{"affected": [{"affectedData": [{"product": "yt-dlp", "vendor": "yt-dlp", "versions": [{"status": "affected", "version": ">= 2023.06.21, < 2026.02.21"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:yt-dlp_project:yt-dlp:*:*:*:*:*:*:*:*", "matchCriteriaId": "12B9D4B5-A1FA-4317-A911-DF469B09D3D5", "versionEndExcluding": "2026.02.21", "versionStartIncluding": "2023.06.21", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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'."}], "id": "CVE-2026-26331", "lastModified": "2026-06-17T10:26:06.463", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-26331", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-24T20:08:27.991642Z", "version": "2.0.3"}}]}, "published": "2026-02-24T03:16:01.710", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/yt-dlp/yt-dlp/commit/1fbbe29b99dc61375bf6d786f824d9fcf6ea9c1a"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2026.02.21"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-g3gw-q23r-pgqm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "yt-dlp: yt-dlp: Arbitrary command injection via maliciously crafted URL when --netrc-cmd is used", "id": "2442143", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442143"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in yt-dlp, a command-line audio/video downloader. When the `--netrc-cmd` command-line option is enabled, a remote attacker can exploit a maliciously crafted URL to achieve arbitrary command injection. This allows the attacker to execute unauthorized commands on the user's system, potentially leading to a complete compromise. This vulnerability primarily affects users who utilize the `--netrc-cmd` feature."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, avoid using the `--netrc-cmd` command-line option or the `netrc_cmd` Python API parameter. If the `--netrc-cmd` option is essential for your workflow, ensure that a placeholder (`{}`) is not passed in the argument. Disabling this feature may impact workflows that rely on custom netrc command execution."}, "name": "CVE-2026-26331", "public_date": "2026-02-24T02:23:40Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-26331\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-26331\nhttps://github.com/yt-dlp/yt-dlp/commit/1fbbe29b99dc61375bf6d786f824d9fcf6ea9c1a\nhttps://github.com/yt-dlp/yt-dlp/releases/tag/2026.02.21\nhttps://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-g3gw-q23r-pgqm"], "statement": "This is an IMPORTANT arbitrary command injection flaw in yt-dlp. The vulnerability occurs when the `--netrc-cmd` command-line option or `netrc_cmd` Python API parameter is actively used. Systems where this specific feature is not enabled or utilized are not affected by this issue.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2023.06.21,2026.02.21)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "yt-dlp", "source": "cna", "vendor": "yt-dlp"}, "product": "yt-dlp", "vendor": "yt-dlp"}], "created": "2026-02-24T09:53:23.808696+00:00", "updated": "2026-06-18T11:00:04.206567+00:00", "vendors": ["yt-dlp", "yt-dlp$PRODUCT$yt-dlp"]}