# AIOHTTP has unicode match groups in regexes for ASCII protocol elements

Advisory record · `GHSA-mqqc-3gqh-h2x8`

- **Identifiers:** `GHSA-mqqc-3gqh-h2x8` · `CVE-2025-69225` · `PYSEC-2026-1109`
- **State:** Confirmed
- **Severity:** CVSS 2.7 Low
- **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:** 5 Jan 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 5 Jan 2026, 23:09 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `aiohttp` (PyPI): affected `<3.13.3`; fixed in `3.13.3`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The aiohttp package versions before 3.13.3 are affected. The parser accepts non-ASCII decimal digits in the Range header, and the source gives few details beyond that, with no known impact and only a possible route to request smuggling. Upgrade to aiohttp 3.13.3 or later.

Written 5 Nov 2026.

## 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

- 2.7 Low, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0028, the 20th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:34 UTC: First seen by agentprime
- 31 Oct 2026, 14:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-mqqc-3gqh-h2x8)

## Sources

- [GitHub Advisory Database: GHSA-mqqc-3gqh-h2x8](https://github.com/advisories/GHSA-mqqc-3gqh-h2x8)
- [OSV: GHSA-mqqc-3gqh-h2x8](https://osv.dev/vulnerability/GHSA-mqqc-3gqh-h2x8)
- <https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8>
- <https://nvd.nist.gov/vuln/detail/CVE-2025-69225>
- <https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96>
- <https://github.com/aio-libs/aiohttp>

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-mqqc-3gqh-h2x8>, 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-mqqc-3gqh-h2x8/>. Everything for agents: <https://agentprime.io/llms.txt>.