GHSA-CXF4-7MRP-VVPR Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter

Related public issue context, not a duplicate Closed issue 1429 "Handle non-UTF-8 paths", 2024-03-24 raised exactly this general concern and even suggested detection via pregmatch'//u', $path !== 1 -- note the reporter's suggested check explicitly compares !== 1, which would correctly treat PCRE'...

Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter

Related public issue context, not a duplicate Closed issue 1429 "Handle non-UTF-8 paths", 2024-03-24 raised exactly this general concern and even suggested detection via pregmatch'//u', $path !== 1 -- note the reporter's suggested check explicitly compares !== 1, which would correctly treat PCRE'...

CVE-2026-102601 Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter

Flysystem is an open source file storage library for PHP. Prior to 3.35.3, the default WhitespacePathNormalizer in src/WhitespacePathNormalizer.php used by Filesystem across adapters calls pregmatch with the u modifier and treats both false and 0 as falsy. A path containing malformed UTF-8 causes...