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CVE-2026-111750medium6.3

AIOHTTP: Pure-Python parser request smuggling

Impact

AIOHTTP, an asynchronous HTTP client/server framework, has a vulnerability in versions prior to 3.14.4, where the pure Python parser accepts ambiguous HTTP request framing, allowing an unauthenticated attacker to smuggle requests under certain conditions. The issue is fixed in version 3.14.4. An intermediary must interpret the framing differently for the attack to be successful.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

aio-libs · GitHub_M

aiohttp

1 range
GitHub_M version evidence

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affected

< 3.14.4

unaffected

unknown

Other versions: unknown

Original source description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the pure Python parser accepts ambiguous HTTP request framing. An unauthenticated attacker can consequently smuggle requests when an application uses AIOHTTP_NO_EXTENSIONS or otherwise runs without a standard wheel and an intermediary interprets the framing differently. This issue is fixed in version 3.14.4.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-111750

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cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-444 ↗

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

GitHub_M

Related →
Contributing organizations · 2
GitHub_M

Assigning organization

2026-10-19
CISA-ADP

Additional data publisher

2026-10-28

What changed

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References

3 sources
github.com/aio-libs/aiohttp/security/advisories/GHSA-pqxq-w44r-73xw
Security advisoryGitHub_M
github.com/aio-libs/aiohttp/commit/9b27347e61454d9f8ca2055f4c67a37dee336e83
PatchGitHub_M
github.com/aio-libs/aiohttp/releases/tag/v3.14.4
Release notesGitHub_M