Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-9799
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 13:23 UTC · Revision 1
Source evidence
Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery
core-osv · Original sourcePublished 1 Sept 2025, 22:02 UTC
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.
osv:CVE-2025-9799
Complete source record
{
"id": "16f38676b83c268bdd4b903ad3055974362949a75c36b9451e0399db9e0f7598",
"url": "https://osv.dev/vulnerability/CVE-2025-9799",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery",
"summary": "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.",
"evidence": "osv:CVE-2025-9799",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-9799.json"
}
}
],
"modified": "2026-10-28T02:30:50.707061305Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9799.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-9799",
"https://vuldb.com/?id.322114",
"https://vuldb.com/?submit.641128",
"https://github.com/langfuse/langfuse/issues/8522",
"https://github.com/langfuse/langfuse/issues/8522#issue-3320549867",
"https://vuldb.com/?ctiid.322114"
],
"provider_metadata": {
"cwe_ids": [
"CWE-918"
],
"cna_assigner": "VulDB",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9799.json"
}
},
"related_cves": [
{
"value": "CVE-2025-9799",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519438,
"published_at": "2025-09-01T22:02:09.356+00:00"
}