Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-pqxq-w44r-73xw

AIOHTTP: Pure-Python parser request smuggling

CVSS 6.3 MediumEPSS 0.0038 · 32nd percentile

Published by the GitHub Advisory Database at 20 Oct 2026, 19:52 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
aiohttpPyPI<3.14.43.14.4
Identifiers
GHSA-pqxq-w44r-73xw · CVE-2026-111750
Weakness (CWE)
CWE-444
Tags
Published
20 Oct 2026
Updated
20 Oct 2026

Machine-written summary

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

The aiohttp package versions before 3.14.4 are vulnerable when the pure Python HTTP parser is in use, which happens when the AIOHTTP_NO_EXTENSIONS setting is enabled or when no standard wheel is installed. An attacker may be able to smuggle HTTP requests past the application. Upgrade to aiohttp 3.14.4 or later. Alternatively, use the default C parser by not forcing the pure Python one.

Written 1 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

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0038, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

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.