CVE-2026-53541

{"id": "CVE-2026-53541", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53541", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-24T20:03:40.743318Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "OliveTin", "product": "OliveTin", "versions": [{"status": "affected", "version": "<= 2025.03.07"}]}]}], "published": "2026-08-21T23:16:26.500", "references": [{"url": "https://github.com/OliveTin/OliveTin/commit/ebffd9f040f791208aee1db2e5a8aecd1e3e603d", "source": "security-advisories@github.com"}, {"url": "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-prj9-97mp-mwh2", "source": "security-advisories@github.com"}, {"url": "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-prj9-97mp-mwh2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "OliveTin gives access to predefined shell commands from a web interface. The `filterToDefinedArgumentsOnly` function in the executor is intended to discard any arguments not explicitly defined in the action's configuration. However, prior to commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d, a special case allows any argument whose name starts with `ot_` to bypass this filter. While two system arguments (`ot_executionTrackingId` and `ot_username`) are injected by OliveTin and overridden, all other `ot_`-prefixed arguments supplied by the user pass through unmodified. These bypassed arguments are not type-checked \u2014 the validation loop only iterates over the action's defined arguments, so `ot_`-prefixed arguments skip all type safety checks entirely; set as environment variables \u2014 via `buildEnv()`, with completely unvalidated values, and passed to the executed command; and included in the template context \u2014 available as `.Arguments.ot_*` in template rendering. Commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d contains a patch."}, {"lang": "es", "value": "OliveTin da acceso a comandos de shell predefinidos desde una interfaz web. La funci\u00f3n 'filterToDefinedArgumentsOnly' en el ejecutor est\u00e1 destinada a descartar cualquier argumento no definido expl\u00edcitamente en la configuraci\u00f3n de la acci\u00f3n. Sin embargo, antes del commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d, un caso especial permite que cualquier argumento cuyo nombre comience con 'ot_' eluda este filtro. Si bien dos argumentos del sistema ('ot_executionTrackingId' y 'ot_username') son inyectados por OliveTin y sobrescritos, todos los dem\u00e1s argumentos con prefijo 'ot_' proporcionados por el usuario pasan sin modificar. Estos argumentos eludidos no son verificados por tipo - el bucle de validaci\u00f3n solo itera sobre los argumentos definidos de la acci\u00f3n, por lo que los argumentos con prefijo 'ot_' omiten por completo todas las comprobaciones de seguridad de tipo; se establecen como variables de entorno - a trav\u00e9s de 'buildEnv()', con valores completamente no validados, y se pasan al comando ejecutado; y se incluyen en el contexto de la plantilla - disponibles como '.Arguments.ot_*' en la renderizaci\u00f3n de plantillas. El commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d contiene un parche."}], "lastModified": "2026-10-14T19:10:00.297", "sourceIdentifier": "security-advisories@github.com"}