CVE Watch29 sept 2026

CVE-2026-102601

Flysystem is an open source file storage library for PHP. Prior to 3.35.3, the default WhitespacePathNormalizer in src/WhitespacePathNormali

CVSS

3.5

Bajo

EPSS

0.3%

p26

KEV

—

Exploit Today

0-100

Publicado: 29 sept 2026 · Última mod.: 29 sept 2026 · CWE-150

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-09-302026-10-19

Descripción técnica

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.

Referencias oficiales

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