CVE-2026-42138

Name: CVE-2026-42138
Creator: NVD / NIST
Published: 2026-05-04T18:16:31.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-42138 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

6.9/10

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:X/V:X/RE:X/U:X

EPSS Probability

0.24%

14.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Langgenius	Dify	< 1.13.1

References

https://github.com/langgenius/dify/releases/tag/1.13.1Release Notes
https://github.com/langgenius/dify/security/advisories/GHSA-cg94-8v83-7hjjExploit, Vendor Advisory
https://github.com/langgenius/dify/security/advisories/GHSA-cg94-8v83-7hjjExploit, Vendor Advisory

Timeline

Published: May 4, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-42138?

How severe is CVE-2026-42138?

CVE-2026-42138 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-42138?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42138?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST