---
schema_version: '1.0'
id: security-20260714-e7b10d
url: https://osv.dev/vulnerability/PYSEC-2026-2094
url_hash: e7b10df06385667642213bd0f8b665432b24c3084934c503b90d4c105d738b91
canonical_url: https://osv.dev/vulnerability/PYSEC-2026-2094
source: osv:pypa
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-22815
- PYSEC-2026-2094
- severity:CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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
- aiohttp
- PyPI
lang: en
published_at: '2026-04-01T21:16:58Z'
fetched_at: '2026-07-14T06:42:23Z'
updated_at: '2026-07-14T06:42:55Z'
status: published
content_hash: 1ea42bc1bee074828118aab4aa5e3a362074b51a09b2bc4c822c6d37d80806f7
license_note: full
summary: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python.
  Prior to version 3.13.4, insufficient restrictions in header/trailer handling could
  cause uncapped memory usage. This issue has been patched in version 3.13.4.
summary_source: rss
summary_en: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and
  Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling
  could cause uncapped memory usage. This issue has been patched in version 3.13.4.
entities: []
key_facts: []
related: []
related_auto: []
title: CVE-2026-22815 — aiohttp
---

# CVE-2026-22815 — aiohttp

## TL;DR
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.

## Key Points
- cve / CVE-2026-22815 / PYSEC-2026-2094 / severity:CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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 / aiohttp / PyPI

## Details
**Severity:** CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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
**Advisory:** PYSEC-2026-2094 (CVE-2026-22815)

**Affected (your watchlist):**
- `PyPI:aiohttp` 3.13.3 → fixed in 3.13.4 [docker/docker-strands]

**Details:**
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.

**References:**
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
- https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-w2fm-2cpv-w7v5

_Data: OSV.dev (upstream: pypa) — https://osv.dev/vulnerability/PYSEC-2026-2094_

## Source
元記事: [CVE-2026-22815 — aiohttp](https://osv.dev/vulnerability/PYSEC-2026-2094) — published 2026-04-01T21:16:58Z