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    CVE-2025-9799

    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.

    Published:Sep 1, 2025
    Last Modified:Dec 2, 2025
    EPS:Sep 1, 2025
    EPSS Score:0.00054
    CVSS Score:5

    Affected Products

    Vendor
    Langfuse
    Product
    Langfuse

    Exploits

    https://github.com/langfuse/langfuse/issues/8522https://github.com/langfuse/langfuse/issues/8522#issue-3320549867

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High