EUVD-2026-66829
GHSA-77f3-qj56-x322
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Network-reachable, no auth or interaction required; limited CIA impact consistent with SSRF without code execution or scope change.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Lifecycle Timeline
3DescriptionCVE.org
A security flaw has been discovered in ddfourtwo sentry-selfhosted-mcp 0.4.0. The affected element is an unknown function of the component raw_sentry_api. The manipulation of the argument endpoint results in server-side request forgery. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
Server-side request forgery in ddfourtwo sentry-selfhosted-mcp 0.4.0 allows remote unauthenticated attackers to manipulate the endpoint argument in the raw_sentry_api component, causing the server to issue arbitrary HTTP requests to internal or external hosts. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) confirms no authentication or user interaction is required, and a public exploit exists via a GitHub issue report. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The MCP server must be reachable over the network by the attacker - no authentication is required per PR:N in the CVSS 4.0 vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector scores 6.9 (Medium) with AV:N/AC:L/AT:N/PR:N/UI:N and impacts rated VC:L/VI:L/VA:L - indicating that unauthenticated remote exploitation is straightforward but individual impact per request is limited. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to an exposed sentry-selfhosted-mcp instance sends a crafted MCP tool invocation to raw_sentry_api with the endpoint parameter set to an internal address such as http://169.254.169.254/latest/meta-data/. The server fetches the resource and returns the response, leaking cloud instance metadata including IAM credentials. … |
| Remediation | No vendor-released patch has been identified at time of analysis - the maintainer had not responded to the issue report (https://github.com/ddfourtwo/sentry-selfhosted-mcp/issues/2) at time of disclosure. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
Leaving vuln.today