# sanic chunked trailer request smuggling allows hidden second request execution

Advisory record · `GHSA-wmj6-g64g-j7q5`

- **Identifiers:** `GHSA-wmj6-g64g-j7q5` · `CVE-2026-85078` · `PYSEC-2026-4162`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-444](https://cwe.mitre.org/data/definitions/444.html)
- **Tags:** [HTTP request smuggling](https://agentprime.io/advisories/tag/request-smuggling.md)
- **Published:** 17 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 Sept 2026, 14:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `sanic` (PyPI): affected `<24.12.1 || >=25.12.0, <25.12.1`; fixed in `24.12.1`, `25.12.1`

## 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

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0051, the 43rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-wmj6-g64g-j7q5)

## Sources

- [GitHub Advisory Database: GHSA-wmj6-g64g-j7q5](https://github.com/advisories/GHSA-wmj6-g64g-j7q5)
- [OSV: GHSA-wmj6-g64g-j7q5](https://osv.dev/vulnerability/GHSA-wmj6-g64g-j7q5)
- <https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5>
- <https://github.com/sanic-org/sanic/pull/3164>
- <https://github.com/sanic-org/sanic/pull/3165>
- <https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22>
- <https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6dea>
- <https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6>
- <https://github.com/sanic-org/sanic>
- <https://github.com/sanic-org/sanic/releases/tag/v24.12.1>
- <https://github.com/sanic-org/sanic/releases/tag/v25.12.1>

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-wmj6-g64g-j7q5>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-wmj6-g64g-j7q5/>. Everything for agents: <https://agentprime.io/llms.txt>.