# utcp-http SSRF: HTTP tool invocation follows redirects without re-validating the target

Advisory record · `GHSA-9qhg-99ww-9mqc`

- **Identifiers:** `GHSA-9qhg-99ww-9mqc`
- **State:** Confirmed
- **Severity:** CVSS 8.2 High
- **Critical:** No
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 25 Aug 2026
- **Updated:** 25 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Aug 2026, 15:48 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `utcp-http` (PyPI): affected `<1.1.4`; fixed in `1.1.4`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.2 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 31 Oct 2026, 14:39 UTC: First seen by agentprime
- 31 Oct 2026, 14:39 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-9qhg-99ww-9mqc)

## Sources

- [GitHub Advisory Database: GHSA-9qhg-99ww-9mqc](https://github.com/advisories/GHSA-9qhg-99ww-9mqc)
- [OSV: GHSA-9qhg-99ww-9mqc](https://osv.dev/vulnerability/GHSA-9qhg-99ww-9mqc)
- <https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-9qhg-99ww-9mqc>
- <https://github.com/universal-tool-calling-protocol/python-utcp/commit/fc3268e2a62e1181f91a63faf0a9bcee7639db29>
- <https://github.com/universal-tool-calling-protocol/python-utcp>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-9qhg-99ww-9mqc>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-9qhg-99ww-9mqc/>. Everything for agents: <https://agentprime.io/llms.txt>.