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.

Metrics

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity High

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00054.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Langfuse
  • Langfuse

Configuration 1 [-]

cpe:2.3:a:langfuse:langfuse:*:*:*:*:*:*:*:*

No data.

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Vendors Products
Langfuse
  • Langfuse
Advisories
Source ID Title
EUVD EUVD EUVD-2025-26361 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.
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/langfuse/langfuse/issues/8522 cve-icon cve-icon
https://github.com/langfuse/langfuse/issues/8522#issue-3320549867 cve-icon cve-icon
https://vuldb.com/?ctiid.322114 cve-icon cve-icon
https://vuldb.com/?id.322114 cve-icon cve-icon
https://vuldb.com/?submit.641128 cve-icon cve-icon
History

Tue, 02 Dec 2025 19:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:langfuse:langfuse:*:*:*:*:*:*:*:*

Tue, 02 Sep 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 02 Sep 2025 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Langfuse
Langfuse langfuse
Vendors & Products Langfuse
Langfuse langfuse

Mon, 01 Sep 2025 22:15:00 +0000

Type Values Removed Values Added
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.
Title Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery
Weaknesses CWE-918
References
Metrics cvssV2_0

{'score': 4.6, 'vector': 'AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 5, 'vector': 'CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2025-09-02T20:10:18.439Z

Reserved: 2025-09-01T12:23:02.536Z

Link: CVE-2025-9799

cve-icon Vulnrichment

Updated: 2025-09-02T19:55:47.973Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-01T22:15:31.283

Modified: 2025-12-02T19:04:22.443

Link: CVE-2025-9799

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-02T15:23:11Z