CVE-2025-9799
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-01

Last updated on: 2026-04-29

Assigner: VulDB

Description
A security flaw has been discovered in Langfuse up to 3.88.0. Affected by this vulnerability is the function promptChangeEventSourcing of the file web/src/features/prompts/server/routers/promptRouter.ts of the component Webhook Handler. Performing manipulation results in server-side request forgery. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitation appears to be difficult. The exploit has been released to the public and may be exploited.
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Meta Information
Published
2025-09-01
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2025-09-02
EPSS Evaluated
2026-06-14
NVD
CVE-2025-9799
EUVD
EUVD-2025-26361
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
langfuse langfuse to 3.88.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

This vulnerability is a security flaw in Langfuse up to version 3.88.0, specifically in the function promptChangeEventSourcing within the Webhook Handler component. It allows an attacker to perform server-side request forgery (SSRF) by manipulating the function. The attack can be initiated remotely but requires a high degree of complexity and is considered difficult to exploit. The exploit has been publicly released.

Impact Analysis

The vulnerability can allow an attacker to perform server-side request forgery, potentially enabling them to make unauthorized requests from the server to internal or external systems. This could lead to unauthorized access to sensitive information, internal network scanning, or other malicious activities depending on the server's environment and configuration.

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