All vulnerabilities
CVE-2026-111748GHSA-f9xw-jh8m-3mwq

AIOHTTP: Absolute-form request targets can spoof Request.scheme

aio-libs aiohttppipLibraries & packages
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.36%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.14.4Fixed versionGitHub
Published19 Oct 2026Updated 20 Oct 2026CVE List

What fixes it

  • 3.14.4aiohttp, pipGitHub
  • 3.14.4aiohttp, PyPIOSVpip install "aiohttp>=3.14.4"

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Summary

An attacker sending an absolute-form request can spoof the scheme used.

Impact

If user code depends on the Request.scheme attribute for anything security related, an attacker may be able to circumvent this logic, tricking the application into thinking a connection is encrypted when it is not, or vice versa.

Workaround

A WAF rule to reject absolute-form requests (legitimate requests should only use this form for proxies).

Text from GitHub Advisory Database

Affected versions 53

  • aiohttp, pip<= 3.14.3GitHub
  • aiohttpaffected: < 3.14.4CVE List
  • aiohttp, PyPIfrom first release, fixed in 3.14.4OSV
  • aiohttp, PyPI0.1OSV
  • aiohttp, PyPI0.10.0OSV
  • aiohttp, PyPI0.10.1OSV
  • aiohttp, PyPI0.10.2OSV
  • aiohttp, PyPI0.11.0OSV
  • aiohttp, PyPI0.12.0OSV
  • aiohttp, PyPI0.13.0OSV
  • aiohttp, PyPI0.13.1OSV
  • aiohttp, PyPI0.14.0OSV
  • aiohttp, PyPI0.14.1OSV
  • aiohttp, PyPI0.14.2OSV
  • aiohttp, PyPI0.14.3OSV
  • aiohttp, PyPI0.14.4OSV
  • aiohttp, PyPI0.15.0OSV
  • aiohttp, PyPI0.15.1OSV
  • aiohttp, PyPI0.15.2OSV
  • aiohttp, PyPI0.15.3OSV
  • aiohttp, PyPI0.16.0OSV
  • aiohttp, PyPI0.16.1OSV
  • aiohttp, PyPI0.16.2OSV
  • aiohttp, PyPI0.16.3OSV
  • aiohttp, PyPI0.16.4OSV
  • aiohttp, PyPI0.16.5OSV
  • aiohttp, PyPI0.16.6OSV
  • aiohttp, PyPI0.17.0OSV
  • aiohttp, PyPI0.17.1OSV
  • aiohttp, PyPI0.17.2OSV
  • aiohttp, PyPI0.17.3OSV
  • aiohttp, PyPI0.17.4OSV
  • aiohttp, PyPI0.18.0OSV
  • aiohttp, PyPI0.18.1OSV
  • aiohttp, PyPI0.18.2OSV
  • aiohttp, PyPI0.18.3OSV
  • aiohttp, PyPI0.18.4OSV
  • aiohttp, PyPI0.19.0OSV
  • aiohttp, PyPI0.2OSV
  • aiohttp, PyPI0.20.0OSV
  • aiohttp, PyPI0.20.1OSV
  • aiohttp, PyPI0.20.2OSV
  • aiohttp, PyPI0.21.0OSV
  • aiohttp, PyPI0.21.1OSV
  • aiohttp, PyPI0.21.2OSV
  • aiohttp, PyPI0.21.4OSV
  • aiohttp, PyPI0.21.5OSV
  • aiohttp, PyPI0.21.6OSV
  • aiohttp, PyPI0.22.0OSV
  • aiohttp, PyPI0.22.0a0OSV
  • aiohttp, PyPI0.22.0b0OSV
  • aiohttp, PyPI0.22.0b1OSV
  • aiohttp, PyPI0.22.0b2OSV

References 5