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High

AIOHTTP: File Descriptor Exhaustion in Multipart Requests

  • Disclosed: 20.10.2026
  • Updated: 20.10.2026 22:18

Summary

An attacker can exhaust file descriptors with specially crafted multipart requests.

Impact

If a handler uses Request.post(), it may be possible for an attacker to use an unlimited number of file descriptors, potentially resulting in resource exhaustion.

What to do

Upgrade aiohttp to version 3.14.4 or later.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) aiohttp >= 2.0.0, < 3.14.4 3.14.4

References

CVSS score -
CVSS vector
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
Weakness (CWE)
CWE-400, CWE-770
Platform
Python (PyPI)
Package
aiohttp
Disclosed
20.10.2026
Updated
20.10.2026 22:18

Sources and licenses · Edited or translated by DockRay; source rights and applicable licenses are retained.

OSV / GitHub Advisory Database - GHSA-9xw5-w5jj-pvcg - CC BY 4.0

Vulnerability history: aiohttp

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (55) in the archive
Total entries
55
First → latest
02.2021 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 7
  • Medium 29
  • Low 19

Disclosures per year

Severity:
  1. AIOHTTP: File Descriptor Exhaustion in Multipart Requests this entry
    High CVE-2026-111066 >= 2.0.0, < 3.14.4 3.14.4
  2. aiohttp server lacks initial request and header timeout
    High CVE-2026-111064 < 3.14.4 3.14.4
  3. aiohttp: Multiple instances of excessive or unbounded memory/CPU use
    High ghsa-2g87-pp6c-29x5 < 3.14.4 3.14.4
  4. AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)
    High CVE-2026-69244 < 3.14.3 3.14.3
  5. AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb
    High · 7.5 CVE-2025-69223 < 3.13.3 3.13.3
  6. aiohttp vulnerable to Denial of Service when trying to parse malformed POST requests
    High · 7.5 CVE-2024-30251 < 3.9.4 3.9.4
  7. aiohttp is vulnerable to directory traversal
    High · 5.9 CVE-2024-23334 >= 1.0.5, < 3.9.2 3.9.2

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