CVE-2026-42138: Dify is an open-source LLM app development platform

Routine

MEDIUM 6.1UPGRADE

CVE-2026-42138 is a medium-severity flaw (CVSS 6.1) affecting dify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-05-04
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: langgenius

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-04 18:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

langgenius dify UPGRADE

Affected: < 1.13.1

Fixed in: 1.13.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls dify

2. UPGRADE to 1.13.1

npm install dify@">=1.13.1"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42138?

dify: upgrade to 1.13.1. Exact commands for each OS are on this page.

Is CVE-2026-42138 being exploited?

CVE-2026-42138 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42138 affect?

CVE-2026-42138 affects dify. Severity is medium (CVSS 6.1). 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

How urgent is CVE-2026-42138?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2026-34082 MEDIUM 4.3 UPGRADE Dify is an open-source LLM app development platform
CVE-2026-61461 HIGH 8.8 UPGRADE Dify before 1.16.0-rc1 contains a SQL injection vulnerability in the MyScale vector store backend that allows

References

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