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CVE-2025-9799

19
FAUCET Score

CVE-2025-9799 is a Server-Side Request Forgery (SSRF) vulnerability affecting Langfuse up to version 3.88.0, specifically within the promptChangeEventSourcing function of the Webhook Handler component. This medium-severity flaw, with a CVSS score of 5.0, can be exploited remotely but requires high attack complexity and low privileges, potentially leading to limited impact on confidentiality, integrity, and availability. While an exploit has been publicly released, there is no evidence of active exploitation, and it currently lacks significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.88.0CPE matchmatch criteria
cpe:2.3:a:langfuse:langfuse:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

1.3LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
LOW
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.26%
Probability of exploitation in next 30 days
EPSS Percentile
17.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0026 is in the 17th percentile among its peer group of 1,424 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / langfuse/langfuse/issues/8522
ExploitIssue Tracking
github.com / langfuse/langfuse/issues/8522
ExploitIssue Tracking
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry