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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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6b31c930d37bd873fa584ffa697905f2d5ab0e963fc1dadd6158a33fdcc12bc8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"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"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"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"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"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"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"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"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"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","ve…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"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"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"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"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"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"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"Server-Side Request Forgery","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["issue-tracking"],"url":"https://github.com/langfuse/langfuse/issues/8522"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/references/3
{"tags":["exploit","issue-tracking"],"url":"https://github.com/langfuse/langfuse/issues/8522#issue-3320549867"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/references/4
{"name":"VDB-322114 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.322114"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/references/1
{"name":"VDB-322114 | Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.322114"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/references/0
{"name":"Submit #641128 | langfuse https://github.com/langfuse/langfuse <=3.88.0 SSRF","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.641128"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d9b9d289bc7fd05ab5c5d2b0984e94842c61b74163baae27b8c6b15e329376f · sha256:fc78f285557611ed… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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