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Advisory record · GHSA-9xw5-w5jj-pvcg

AIOHTTP: File descriptor exhaustion in multipart requests

CVSS 8.2 HighEPSS 0.0041 · 35th 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>=2.0.0, <3.14.43.14.4
Identifiers
GHSA-9xw5-w5jj-pvcg · CVE-2026-111066
Weakness (CWE)
CWE-400 · CWE-770
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 from 2.0.0 before 3.14.4, is vulnerable to file descriptor exhaustion through specially crafted multipart requests. A remote attacker can make a handler that uses Request.post() consume an unlimited number of file descriptors, which can exhaust resources. Upgrade to aiohttp 3.14.4. The source gives few details on any workaround.

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
8.2 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0041, the 35th percentile, on 7 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.