CVE-2026-27489: Cpp Symlink Validation Missing Canonicalization
Validation of paths using `is_symlink()` only checks the final component of a path. If intermediate directories are symbolic links, this check can be bypassed, leading to path traversal vulnerabilities (CWE-59, CWE-22). Use `canonical()` or `weakly_canonical()` to fully resolve paths against the actual operating system file system.
C++greprules fetch cve-2026-27489-cpp-symlink-validation-missing-canonicalization --engine opengrepDescription
Validation of paths using `is_symlink()` only checks the final component of a path. If intermediate directories are symbolic links, this check can be bypassed, leading to path traversal vulnerabilities (CWE-59, CWE-22). Use `canonical()` or `weakly_canonical()` to fully resolve paths against the actual operating system file system.
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