CVE-2025-9799 (GCVE-0-2025-9799)
Vulnerability from cvelistv5 – Published: 2025-09-01 22:02 – Updated: 2025-09-02 20:10
VLAI
EPSS
VEX
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-02 19:51 UTC
CWE
- CWE-918 - Server-Side Request Forgery
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.322114 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.322114 | signaturepermissions-required |
| https://vuldb.com/?submit.641128 | third-party-advisory |
| https://github.com/langfuse/langfuse/issues/8522 | issue-tracking |
| https://github.com/langfuse/langfuse/issues/8522#… | exploitissue-tracking |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| n/a | Langfuse |
Affected:
3.0
Affected: 3.1 Affected: 3.2 Affected: 3.3 Affected: 3.4 Affected: 3.5 Affected: 3.6 Affected: 3.7 Affected: 3.8 Affected: 3.9 Affected: 3.10 Affected: 3.11 Affected: 3.12 Affected: 3.13 Affected: 3.14 Affected: 3.15 Affected: 3.16 Affected: 3.17 Affected: 3.18 Affected: 3.19 Affected: 3.20 Affected: 3.21 Affected: 3.22 Affected: 3.23 Affected: 3.24 Affected: 3.25 Affected: 3.26 Affected: 3.27 Affected: 3.28 Affected: 3.29 Affected: 3.30 Affected: 3.31 Affected: 3.32 Affected: 3.33 Affected: 3.34 Affected: 3.35 Affected: 3.36 Affected: 3.37 Affected: 3.38 Affected: 3.39 Affected: 3.40 Affected: 3.41 Affected: 3.42 Affected: 3.43 Affected: 3.44 Affected: 3.45 Affected: 3.46 Affected: 3.47 Affected: 3.48 Affected: 3.49 Affected: 3.50 Affected: 3.51 Affected: 3.52 Affected: 3.53 Affected: 3.54 Affected: 3.55 Affected: 3.56 Affected: 3.57 Affected: 3.58 Affected: 3.59 Affected: 3.60 Affected: 3.61 Affected: 3.62 Affected: 3.63 Affected: 3.64 Affected: 3.65 Affected: 3.66 Affected: 3.67 Affected: 3.68 Affected: 3.69 Affected: 3.70 Affected: 3.71 Affected: 3.72 Affected: 3.73 Affected: 3.74 Affected: 3.75 Affected: 3.76 Affected: 3.77 Affected: 3.78 Affected: 3.79 Affected: 3.80 Affected: 3.81 Affected: 3.82 Affected: 3.83 Affected: 3.84 Affected: 3.85 Affected: 3.86 Affected: 3.87 Affected: 3.88.0 |
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"baseScore": 5.0,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 3.4,
"source": "cna@vuldb.com",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 1.3,
"baseSeverity": "LOW",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "PROOF_OF_CONCEPT",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "cna@vuldb.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-9799",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-02T19:51:53.283383Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-01T22:15:31.283",
"references": [
{
"source": "cna@vuldb.com",
"tags": [
"Exploit",
"Issue Tracking"
],
"url": "https://github.com/langfuse/langfuse/issues/8522"
},
{
"source": "cna@vuldb.com",
"tags": [
"Exploit",
"Issue Tracking"
],
"url": "https://github.com/langfuse/langfuse/issues/8522#issue-3320549867"
},
{
"source": "cna@vuldb.com",
"tags": [
"Permissions Required",
"VDB Entry"
],
"url": "https://vuldb.com/?ctiid.322114"
},
{
"source": "cna@vuldb.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://vuldb.com/?id.322114"
},
{
"source": "cna@vuldb.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://vuldb.com/?submit.641128"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-918"
}
],
"source": "cna@vuldb.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-09-03T22:29:35+00:00",
"cve": "CVE-2025-9799",
"id": "CVE-2025-9799",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-9799.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9799",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-02T19:51:53.283383Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-02T19:55:47.973Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"Webhook Handler"
],
"product": "Langfuse",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "3.0"
},
{
"status": "affected",
"version": "3.1"
},
{
"status": "affected",
"version": "3.2"
},
{
"status": "affected",
"version": "3.3"
},
{
"status": "affected",
"version": "3.4"
},
{
"status": "affected",
"version": "3.5"
},
{
"status": "affected",
"version": "3.6"
},
{
"status": "affected",
"version": "3.7"
},
{
"status": "affected",
"version": "3.8"
},
{
"status": "affected",
"version": "3.9"
},
{
"status": "affected",
"version": "3.10"
},
{
"status": "affected",
"version": "3.11"
},
{
"status": "affected",
"version": "3.12"
},
{
"status": "affected",
"version": "3.13"
},
{
"status": "affected",
"version": "3.14"
},
{
"status": "affected",
"version": "3.15"
},
{
"status": "affected",
"version": "3.16"
},
{
"status": "affected",
"version": "3.17"
},
{
"status": "affected",
"version": "3.18"
},
{
"status": "affected",
"version": "3.19"
},
{
"status": "affected",
"version": "3.20"
},
{
"status": "affected",
"version": "3.21"
},
{
"status": "affected",
"version": "3.22"
},
{
"status": "affected",
"version": "3.23"
},
{
"status": "affected",
"version": "3.24"
},
{
"status": "affected",
"version": "3.25"
},
{
"status": "affected",
"version": "3.26"
},
{
"status": "affected",
"version": "3.27"
},
{
"status": "affected",
"version": "3.28"
},
{
"status": "affected",
"version": "3.29"
},
{
"status": "affected",
"version": "3.30"
},
{
"status": "affected",
"version": "3.31"
},
{
"status": "affected",
"version": "3.32"
},
{
"status": "affected",
"version": "3.33"
},
{
"status": "affected",
"version": "3.34"
},
{
"status": "affected",
"version": "3.35"
},
{
"status": "affected",
"version": "3.36"
},
{
"status": "affected",
"version": "3.37"
},
{
"status": "affected",
"version": "3.38"
},
{
"status": "affected",
"version": "3.39"
},
{
"status": "affected",
"version": "3.40"
},
{
"status": "affected",
"version": "3.41"
},
{
"status": "affected",
"version": "3.42"
},
{
"status": "affected",
"version": "3.43"
},
{
"status": "affected",
"version": "3.44"
},
{
"status": "affected",
"version": "3.45"
},
{
"status": "affected",
"version": "3.46"
},
{
"status": "affected",
"version": "3.47"
},
{
"status": "affected",
"version": "3.48"
},
{
"status": "affected",
"version": "3.49"
},
{
"status": "affected",
"version": "3.50"
},
{
"status": "affected",
"version": "3.51"
},
{
"status": "affected",
"version": "3.52"
},
{
"status": "affected",
"version": "3.53"
},
{
"status": "affected",
"version": "3.54"
},
{
"status": "affected",
"version": "3.55"
},
{
"status": "affected",
"version": "3.56"
},
{
"status": "affected",
"version": "3.57"
},
{
"status": "affected",
"version": "3.58"
},
{
"status": "affected",
"version": "3.59"
},
{
"status": "affected",
"version": "3.60"
},
{
"status": "affected",
"version": "3.61"
},
{
"status": "affected",
"version": "3.62"
},
{
"status": "affected",
"version": "3.63"
},
{
"status": "affected",
"version": "3.64"
},
{
"status": "affected",
"version": "3.65"
},
{
"status": "affected",
"version": "3.66"
},
{
"status": "affected",
"version": "3.67"
},
{
"status": "affected",
"version": "3.68"
},
{
"status": "affected",
"version": "3.69"
},
{
"status": "affected",
"version": "3.70"
},
{
"status": "affected",
"version": "3.71"
},
{
"status": "affected",
"version": "3.72"
},
{
"status": "affected",
"version": "3.73"
},
{
"status": "affected",
"version": "3.74"
},
{
"status": "affected",
"version": "3.75"
},
{
"status": "affected",
"version": "3.76"
},
{
"status": "affected",
"version": "3.77"
},
{
"status": "affected",
"version": "3.78"
},
{
"status": "affected",
"version": "3.79"
},
{
"status": "affected",
"version": "3.80"
},
{
"status": "affected",
"version": "3.81"
},
{
"status": "affected",
"version": "3.82"
},
{
"status": "affected",
"version": "3.83"
},
{
"status": "affected",
"version": "3.84"
},
{
"status": "affected",
"version": "3.85"
},
{
"status": "affected",
"version": "3.86"
},
{
"status": "affected",
"version": "3.87"
},
{
"status": "affected",
"version": "3.88.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ZAST.AI (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "de",
"value": "In Langfuse bis 3.88.0 wurde eine Schwachstelle gefunden. Hierbei betrifft es die Funktion promptChangeEventSourcing der Datei web/src/features/prompts/server/routers/promptRouter.ts der Komponente Webhook Handler. Mit der Manipulation mit unbekannten Daten kann eine server-side request forgery-Schwachstelle ausgenutzt werden. Der Angriff l\u00e4sst sich \u00fcber das Netzwerk starten. Die Komplexit\u00e4t eines Angriffs ist eher hoch. Es wird angegeben, dass die Ausnutzbarkeit schwierig ist. Die Ausnutzung wurde ver\u00f6ffentlicht und kann verwendet werden."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 2.3,
"baseSeverity": "LOW",
"vectorString": "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",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5,
"baseSeverity": "MEDIUM",
"vectorString": "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",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5,
"baseSeverity": "MEDIUM",
"vectorString": "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",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 4.6,
"vectorString": "AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "Server-Side Request Forgery",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-01T22:02:09.356Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-322114 | Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.322114"
},
{
"name": "VDB-322114 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.322114"
},
{
"name": "Submit #641128 | langfuse https://github.com/langfuse/langfuse \u003c=3.88.0 SSRF",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.641128"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/langfuse/langfuse/issues/8522"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/langfuse/langfuse/issues/8522#issue-3320549867"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-01T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-01T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-01T14:29:18.000Z",
"value": "VulDB entry last update"
}
],
"title": "Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-9799",
"datePublished": "2025-09-01T22:02:09.356Z",
"dateReserved": "2025-09-01T12:23:02.536Z",
"dateUpdated": "2025-09-02T20:10:18.439Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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