{"cve":"CVE-2011-4211","nvd":{"published":"2011-10-30T19:55:00.960","modified":"2026-06-16T23:34:34.957","status":"Modified","description":"The FakeFile implementation in the sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly control the opening of files, which allows local users to bypass intended access restrictions and create arbitrary files via ALLOWED_MODES and ALLOWED_DIRS changes within the code parameter to _ah/admin/interactive/execute, a different vulnerability than CVE-2011-1364.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://blog.watchfire.com/files/googleappenginesdk.pdf","http://code.google.com/p/googleappengine/wiki/SdkReleaseNotes","http://www.securityfocus.com/bid/50464","https://exchange.xforce.ibmcloud.com/vulnerabilities/71064","http://blog.watchfire.com/files/googleappenginesdk.pdf"],"products":["google:app_engine_python_sdk"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-4211","score":0.0022,"percentile":0.12656,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}