CVE-2026-102601

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.

• CWE-150

• https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77
• https://github.com/thephpleague/flysystem/releases/tag/3.35.3
• https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr
• https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr

Published

Sep 29, 2026

Last Modified

Sep 29, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-102570ClipBucket v5 through 5.5.3-#197 contains a time-based blind…5.5
• CVE-2026-10258A weakness has been identified in itsourcecode Content Manag…6.3
• CVE-2026-10259A security vulnerability has been detected in H3C Magic B0 u…8.8
• CVE-2026-102598Werkzeug is a comprehensive WSGI web application library. Pr…6.3
• CVE-2026-10260A vulnerability was detected in CodeAstro Online Job Portal …7.3
• CVE-2026-102600Socket.IO enables bidirectional and low-latency communicatio…7.5
• CVE-2026-10261A flaw has been found in CodeAstro Online Job Portal 1.0. Th…7.3
• CVE-2026-10262A vulnerability has been found in code-projects Real State S…7.3
• CVE-2026-10263A vulnerability was found in SourceCodester Computer Repair …7.3
• CVE-2026-102630UnoPim versions before 2.0.1 and 2.1.1 trust all connecting …4.7
• CVE-2026-10264A vulnerability was determined in lharries whatsapp-mcp 0.0.…3.5
• CVE-2026-10265A vulnerability was identified in itsourcecode Content Manag…6.3