langgenius dify up to 1.13.0 Application API /api/files/upload cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in langgenius dify up to 1.13.0. The affected element is an unknown function of the file /api/files/upload of the component Application API. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-42138. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in langgenius dify up to 1.13.0. It has been classified as problematic. This affects some unknown processing of the file /api/files/upload of the component Application API. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-42138 since 04/24/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.13.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: dify 1.13.1

Timelineinfo

04/24/2026 CVE reserved
05/04/2026 +10 days Advisory disclosed
05/04/2026 +0 days VulDB entry created
05/04/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-cg94-8v83-7hjj
Status: Confirmed

CVE: CVE-2026-42138 (🔒)
GCVE (CVE): GCVE-0-2026-42138
GCVE (VulDB): GCVE-100-361059

Entryinfo

Created: 05/04/2026 23:05
Changes: 05/04/2026 23:05 (70)
Complete: 🔍
Cache ID: 216::103

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