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🐍 PyPI

GHSA-mfx4-hv73-q22v

GHSA-mfx4-hv73-q22v is a CWE-444 vulnerability in aiohttp. O3 Security confirms whether GHSA-mfx4-hv73-q22v is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

AIOHTTP: HTTP request smuggling via WebSocket upgrade

Also known asCVE-2026-69243PYSEC-2026-3546
Published
Aug 3, 2026
Updated
Aug 4, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐍aiohttp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Summary

The HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades.

Impact

If using the server-side component, it may be possible for an attacker to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. AIOHTT is unaware of any public exploit code.


Patch: https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIaiohttpall versions3.14.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for aiohttp. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update aiohttp to 3.14.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mfx4-hv73-q22v is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-mfx4-hv73-q22v is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-mfx4-hv73-q22v. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary The HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. ### Impact If using the server-side component, it may be possible for an attacker to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. AIOHTT is unaware of any public exploit code. --- Patch: https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98
O3 Security · Impact-Aware SCA

Is GHSA-mfx4-hv73-q22v in your dependencies?

O3 detects GHSA-mfx4-hv73-q22v across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.