EUVD-2026-87985
GHSA-967h-fcmq-3m25
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/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 SSRF requiring the host to ingest/invoke an attacker-influenced tool (UI:R) but no client auth (PR:N); reaching internal services crosses a trust boundary (S:C) with high read impact (C:H) and minor integrity effect.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.
Articles & Coverage 1
AnalysisAI
python-utcp versions before 1.1.4 allow server-side request forgery through the utcp-http plugin's HttpCommunicationProtocol.call_tool, which validates the initial tool URL but follows HTTP redirects with no per-hop re-validation, so an attacker-controlled tool endpoint can return a 3xx Location that drives the UTCP client into internal HTTP services or the cloud metadata endpoint (169.254.169.254) and returns the response body to the tool caller. The vulnerable path is the core UTCP pattern of registering a tool or manual/OpenAPI spec from a runtime-supplied URL and then invoking it; the initial URL only needs to pass ensure_secure_url (any https:// or a benign attacker-owned host), with the attacker supplying the redirect. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
No credit card · 7-day full trial
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires python-utcp's utcp-http plugin where HttpCommunicationProtocol.call_tool is used and a tool/manual endpoint URL is attacker-influenced - the core UTCP pattern of discovering a manual or OpenAPI spec from a runtime-supplied URL, or an existing legitimate endpoint that is attacker-controlled/compromised. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine, patch-worthy SSRF (CWE-918) but the practical priority is moderate, not critical, once the vendor's own 4.0 vector is decomposed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade python-utcp / the utcp-http plugin to 1.1.4 or later, which is the vendor-released fix for this issue, and confirm the redirect-handling change is present (upstream fix commit fc3268e2a62e1181f91a63faf0a9bcee7639db29); see the GHSA advisory at https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-9qhg-99ww-9mqc for details. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all python-utcp deployments and identify any version below 1.1.4; block outbound access from UTCP clients to 169.254.169.254 and internal RFC1918 ranges, and disable or restrict registration/invocation of runtime-supplied tool and OpenAPI specs until patched. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Wazuh SIEM platform versions 4.4.0 through 4.9.0 contain an unsafe deserialization vulnerability in the DistributedAPI t
BentoML version 1.4.2 and earlier contains an unauthenticated remote code execution vulnerability through insecure deser
pgAdmin 4 contains critical remote code execution vulnerabilities in the Query Tool download and Cloud Deployment endpoi
The renderLocalView function in render/views.py in graphite-web in Graphite 0.9.5 through 0.9.10 uses the pickle Python
BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Rated critica
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph
pyLoad download manager version prior to 0.5.0b3.dev77 exposes the Flask SECRET_KEY through an unauthenticated endpoint.
Langflow (a visual LLM pipeline builder) contains a critical unauthenticated code execution vulnerability (CVE-2026-3301
In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and conse
Unauthenticated remote code execution affects Kestra OSS (the open-source event-driven orchestration platform) prior to
Unauthenticated remote code execution in Marimo ≤0.20.4 allows attackers to execute arbitrary system commands via the `/
pyLoad is the free and open-source Download Manager written in pure Python. Rated medium severity (CVSS 5.3), this vulne
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
View allShare
External POC / Exploit Code
Leaving vuln.today