PT-2026-36885 · Dify · Dify

Kast3T · Published 2026-05-04 · Updated 2026-05-11 · CVE-2026-42138

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Dify versions prior to 1.13.1

Description An issue exists in this open-source LLM app development platform where users can upload SVG files containing Cross-Site Scripting (XSS), which is a technique that allows attackers to execute malicious scripts in the victim's browser. This can be achieved through the unauthenticated endpoint "POST /api/files/upload" or the authenticated endpoint "POST /v1/files/upload".

Recommendations Update to version 1.13.1.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-42138

Affected Products

Dify

References · 7

• 🔥 https://github.com/langgenius/dify/security/advisories/GHSA-cg94-8v83-7hjj · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-42138 · Security Note
• https://github.com/langgenius/dify/releases/tag/1.13.1 · Note
• https://twitter.com/VulmonFeeds/status/2051383173414613165 · Twitter Post
• https://twitter.com/CVEnew/status/2051361257408631193 · Twitter Post
• https://t.me/cveNotify/163120 · Telegram Post
• https://t.me/CVEtracker/52654 · Telegram Post