Server-Side Request Forgery Vulnerability in Langfuse Webhook Handler
CVE-2025-9799
Key Information:
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What is CVE-2025-9799?
A security flaw has been identified in the Langfuse application versions up to 3.88.0, specifically within the function promptChangeEventSourcing in the promptRouter.ts file. This vulnerability enables server-side request forgery, allowing potential attackers to manipulate server requests remotely. Although exploiting this vulnerability requires a high level of complexity, it poses a significant risk as the exploit has been publicly disclosed, increasing the likelihood of unauthorized access to sensitive server resources. It is crucial for users and organizations relying on Langfuse to implement necessary security measures to mitigate the potential impact.
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Affected Version(s)
Langfuse 3.0
Langfuse 3.1
Langfuse 3.2
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
CVSS V4
Timeline
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved