CVE-2026-14534

{"id": "CVE-2026-14534", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-14534", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-06T14:59:25.631510Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082", "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}]}, "affected": [{"source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082", "affectedData": [{"vendor": "trailofbits", "product": "fickling", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "0.1.10"}, {"status": "unaffected", "version": "0.1.11", "versionType": "custom"}], "packageName": "fickling", "collectionURL": "https://pypi.org/project/fickling/", "defaultStatus": "unaffected"}]}], "published": "2026-07-04T14:16:28.400", "references": [{"url": "https://github.com/trailofbits/fickling/commit/e8408615b63adf034f891f653692ab9b51f0f5af", "tags": ["Patch"], "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082"}, {"url": "https://github.com/trailofbits/fickling/pull/272", "tags": ["Issue Tracking", "Patch"], "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082"}, {"url": "https://github.com/trailofbits/fickling/releases/tag/v0.1.11", "tags": ["Release Notes"], "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082"}, {"url": "https://github.com/trailofbits/fickling/security/advisories/GHSA-m6fh-58r7-x697", "tags": ["Exploit", "Vendor Advisory"], "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082"}, {"url": "https://github.com/trailofbits/fickling/security/advisories/GHSA-m6fh-58r7-x697", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082", "description": [{"lang": "en", "value": "CWE-184"}, {"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules _posixsubprocess, site, and atexit in the UNSAFE_IMPORTS denylist (fickle.py). Because these modules are absent from the denylist, fickling's check_safety() function returns LIKELY_SAFE with zero findings for pickle payloads that invoke dangerous functions including _posixsubprocess.fork_exec (C-level process spawner capable of executing arbitrary binaries), site.execsitecustomize (executes arbitrary site customization code), and atexit._run_exitfuncs (triggers all registered exit handler callbacks). The fickling.load() API chains check_safety() into pickle.loads() as an explicit security gate; a LIKELY_SAFE verdict causes the payload to be deserialized and executed. This shares the same root cause as CVE-2026-22607 (cProfile), CVE-2025-67748 (pty), and CVE-2025-67747 (marshal/types). OvertlyBadEvals does not flag these modules because they are standard library imports. UnsafeImports does not flag them because they are not in the denylist. The UnusedVariables heuristic is defeated by the SETITEMS opcode pattern."}, {"lang": "es", "value": "Las versiones de fickling de Trail of Bits hasta la 0.1.10 inclusive no incluyen los m\u00f3dulos de la biblioteca est\u00e1ndar de Python _posixsubprocess, site y atexit en la lista de denegaci\u00f3n UNSAFE_IMPORTS (fickle.py). Debido a que estos m\u00f3dulos est\u00e1n ausentes de la lista de denegaci\u00f3n, la funci\u00f3n check_safety() de fickling devuelve LIKELY_SAFE con cero hallazgos para cargas \u00fatiles de pickle que invocan funciones peligrosas, incluyendo _posixsubprocess.fork_exec (generador de procesos a nivel de C capaz de ejecutar binarios arbitrarios), site.execsitecustomize (ejecuta c\u00f3digo de personalizaci\u00f3n de sitio arbitrario) y atexit._run_exitfuncs (activa todas las devoluciones de llamada de los gestores de salida registrados). La API fickling.load() encadena check_safety() en pickle.loads() como una puerta de seguridad expl\u00edcita; un veredicto LIKELY_SAFE hace que la carga \u00fatil sea deserializada y ejecutada. Esto comparte la misma causa ra\u00edz que CVE-2026-22607 (cProfile), CVE-2025-67748 (pty) y CVE-2025-67747 (marshal/types). OvertlyBadEvals no marca estos m\u00f3dulos porque son importaciones de la biblioteca est\u00e1ndar. UnsafeImports no los marca porque no est\u00e1n en la lista de denegaci\u00f3n. La heur\u00edstica UnusedVariables es eludida por el patr\u00f3n de c\u00f3digo de operaci\u00f3n SETITEMS."}], "lastModified": "2026-10-25T15:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "7D2B4444-58DC-4227-BBD7-D68FB61FA761", "versionEndIncluding": "0.1.10"}], "operator": "OR"}]}], "sourceIdentifier": "aa17e1a1-c329-4d6e-a1ed-8d0188aea082"}