---
schema_version: '1.0'
id: security-20260711-e0b270
url: https://osv.dev/vulnerability/GHSA-w2fm-2cpv-w7v5
url_hash: e0b27029327369d1c4a6ff069afda9329ac580905b635c8e4f30d178b18b074a
canonical_url: https://osv.dev/vulnerability/GHSA-w2fm-2cpv-w7v5
source: osv:ghsa
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-22815
- GHSA-w2fm-2cpv-w7v5
- 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
- aiohttp
- PyPI
lang: en
published_at: '2026-04-01T19:45:17Z'
fetched_at: '2026-07-11T06:37:17Z'
updated_at: '2026-07-11T06:38:28Z'
status: published
content_hash: 7ce12c358bb01ea7ea21551f827707f4707ec28a3b3473368f9e8588d10c1356
license_note: full
summary: aiohttp allows unlimited trailer headers, leading to possible uncapped memory
  usage
summary_source: rss
summary_en: aiohttp allows unlimited trailer headers, leading to possible uncapped
  memory usage
entities:
- name: Tokyo Yakult Swallows
  type: organization
- name: 'Conspiracies and regrets abound in Dune: Part Three trailer'
  type: UNKNOWN
key_facts: []
related: []
related_auto:
- name: agent_n8n_1_bot
  type: organization
  weight: 1.0
- name: 'Dune: Part Three'
  type: event
  weight: 1.0
title: 'CVE-2026-22815: aiohttp allows unlimited trailer headers, leading to possible
  uncapped memory usage'
---

# CVE-2026-22815: aiohttp allows unlimited trailer headers, leading to possible uncapped memory usage

## TL;DR
aiohttp allows unlimited trailer headers, leading to possible uncapped memory usage

## Key Points
- cve / CVE-2026-22815 / GHSA-w2fm-2cpv-w7v5 / 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 / 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
**Advisory:** GHSA-w2fm-2cpv-w7v5 (CVE-2026-22815)

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

**Details:**
### Summary

Insufficient restrictions in header/trailer handling could cause uncapped memory usage.

### Impact

An application could cause memory exhaustion when receiving an attacker controlled request or response. A vulnerable web application could mitigate these risks with a typical reverse proxy configuration.

-----

Patch: https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36

**References:**
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-w2fm-2cpv-w7v5
- https://nvd.nist.gov/vuln/detail/CVE-2026-22815
- https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4

_Data: OSV.dev (upstream: ghsa) — https://osv.dev/vulnerability/GHSA-w2fm-2cpv-w7v5_

## Source
元記事: [CVE-2026-22815: aiohttp allows unlimited trailer headers, leading to possible uncapped memory usage](https://osv.dev/vulnerability/GHSA-w2fm-2cpv-w7v5) — published 2026-04-01T19:45:17Z