php-league-flysystem: Flysystem is an open source file storage library for PHP
CVE-2026-102601 is fixed in php-league-flysystem on 1 platform by DEBIAN-CVE-2026-102601 (version 3.36.0-1), released October 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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 preg_match with the u modifier and treats both false and 0 as falsy. A path containing malformed UTF-8 causes PCRE to return false, so paths that also contain control characters bypass CorruptedPathDetected::forPath() in normalizePath(). Filesystem::write() can store such names and Filesystem::listContents() can return the raw ANSI escape sequences, allowing hidden or spoofed terminal file listings when an administrator displays them. This issue is fixed in version 3.35.3.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| php-league-flysystem · Debian 14 | 3.36.0-1 | DEBIAN-CVE-2026-102601 | Oct 28, 2026 |
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