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Vulnerability record · CVE-2026-42138 · published 4 May 2026

CVE-2026-42138: Langgenius dify cross-site scripting vulnerability

LLanggenius · Dify

Dify is an open-source LLM app development platform. Prior to version 1.13.1, using the method POST /api/files/upload, any unauthenticated user can upload an SVG file with XSS. The method POST /v1/files/upload, which requires authentication through the application API, is also vulnerable. This issue has been patched in version 1.13.1.

6.9 CVSS 4.0 Medium EPSS 0.34% · top 75.4% CWE-79 · Cross-site scripting
6.9CVSS 4.0 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Dify is an open-source LLM app development platform. Prior to version 1.13.1, using the method POST /api/files/upload, any unauthenticated user can upload an SVG file with XSS. The method POST /v1/files/upload, which requires authentication through the application API, is also vulnerable. This issue has been patched in version 1.13.1.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/langgenius/dify/releases/tag/1.13.1 Release Notes
https://github.com/langgenius/dify/security/advisories/GHSA-cg94-8v83-7hjj ExploitVendor Advisory
https://github.com/langgenius/dify/security/advisories/GHSA-cg94-8v83-7hjj ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42138), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.