CVE-2026-109965: Python Path Containment Accept Decision Without Symlink Resolution
A path-containment (allow) decision is computed purely lexically: a candidate path is compared against a root directory with os.path.commonpath([ROOT, PATH]) == ROOT (any operand order, root compared directly or via str(...)), while the deciding function never resolves symlinks - no os.path.realpath/realpath, no Path.resolve, and no symlink-escape guard such
Pythongreprules fetch cve-2026-109965-python-path-containment-accept-decision-without-symlink-resolution --engine opengrepDescription
A path-containment (allow) decision is computed purely lexically: a candidate path is compared against a root directory with os.path.commonpath([ROOT, PATH]) == ROOT (any operand order, root compared directly or via str(...)), while the deciding function never resolves symlinks - no os.path.realpath/realpath, no Path.resolve, and no symlink-escape guard such
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