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.
Published: 2025-09-01
Score: 2.3 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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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.
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'}

Subscriptions

Langfuse Langfuse
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: 2026-04-29T01:00:01.613

Link: CVE-2025-9799

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses