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CVE-2026-61448: Trailing Dot Extension Bypasscve-2026-61448-trailing-dot-extension-bypass

Extracting a file extension using substring/slice from lastIndexOf('.') guarded only by includes('.') results in an empty extension when filenames have trailing dots, potentially bypassing extension validation.

JSCVE-2026-61448CWE-434CWE-79
by Provallyupdated 2026-09-02Apache-2.0
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