CVE-2026-102598

Werkzeug is a comprehensive WSGI web application library. Prior to 3.1.9, the safe_join function used by send_from_directory can allow a NUL: special-device path because safe_join checks the Windows device name without first removing an empty NTFS ADS marker. The trigger is that an application runs on Windows with NTFS and serves a user-specified path ending in a special device name such as NUL:. The attack mechanism is that a requested path ends in a Windows special device name with an empty ADS marker. The impact is that the special device opens successfully and the file read hangs indefinitely. This issue is fixed in version 3.1.9.

• CWE-67

• https://github.com/pallets/werkzeug/commit/8d77320bcdf3a34941ec06dcf16b03c065cd21b6
• https://github.com/pallets/werkzeug/pull/3309
• https://github.com/pallets/werkzeug/releases/tag/3.1.9
• https://github.com/pallets/werkzeug/security/advisories/GHSA-g6x2-hccm-hh4m

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-2026-102568Pardus Parental Control before 0.7.0 contains an incorrect a…5.5
• CVE-2026-102569ClipBucket v5 through 5.5.3-#197 contains a time-based blind…5.5
• CVE-2026-10257A security flaw has been discovered in itsourcecode Content …6.3
• 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-2026-10260A vulnerability was detected in CodeAstro Online Job Portal …7.3
• CVE-2026-102600Socket.IO enables bidirectional and low-latency communicatio…7.5
• CVE-2026-102601Flysystem is an open source file storage library for PHP. Pr…3.5
• 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