MEDIUMCVSS v4 6.3Vulnerability

CVE-2026-111750

### Summary The pure Python parser is vulnerable to an HTTP request smuggling attack. ### Impact If users are using the Python parser (`AIOHTTP_NO_EXTENSIONS`, or not a standard wheel installed), then an application may be vulnerable to a request smuggling attack. ### Workaround Switch to the default C parser.

Properties

Summary
AIOHTTP: Pure-Python parser request smuggling
Severity
medium
Nvd fetched at
2026-10-20T21:14:08.448323+00:00
Epss score
0.00304
Cvss score
6.3
Cvss severity
MEDIUM
Retrieved at
2026-10-21T01:24:48+00:00
Ghsa published
2026-10-20T19:52:21Z
Source url
https://github.com/advisories/GHSA-pqxq-w44r-73xw
Ghsa updated
2026-10-20T19:52:22Z
Ghsa id
GHSA-pqxq-w44r-73xw
Last source
FIRST EPSS
Score
6.3
Cvss version
4.0
Cve id
CVE-2026-111750
Cvss vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
First seen by Signal
2026-10-19T19:31:52+00:00
Is ghsa only
false
Vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published at
2026-10-19T17:17:04.253

Related Entities (3)

AFFECTS (1)

→[Software]pip/aiohttp

VULNERABLE_TO (1)

←[Software]pip/aiohttp

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CVE-2026-111750 (CVSS v4 6.3) — Ninja Signal Threat Intelligence | Ninja Signal