---
schema_version: '1.0'
id: security-20260711-149a61
url: https://osv.dev/vulnerability/GHSA-m6qw-4cw2-hm4m
url_hash: 149a61649239e54e81c6ff9ed9187ae28027a03a4ef2a9efc23647bc508e0bca
canonical_url: https://osv.dev/vulnerability/GHSA-m6qw-4cw2-hm4m
source: osv:ghsa
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-50269
- GHSA-m6qw-4cw2-hm4m
- severity:CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
- aiohttp
- PyPI
lang: en
published_at: '2026-06-15T20:07:26Z'
fetched_at: '2026-07-11T06:37:17Z'
updated_at: '2026-07-11T06:38:28Z'
status: published
content_hash: 38883c51658267ff3ee012eb4f96af37273f303932930cb0dea8da79ad9a396e
license_note: full
summary: 'aiohttp: CRLF injection in multipart headers'
summary_source: rss
summary_en: 'aiohttp: CRLF injection in multipart headers'
entities: []
key_facts: []
related: []
related_auto: []
title: 'CVE-2026-50269: aiohttp: CRLF injection in multipart headers'
---

# CVE-2026-50269: aiohttp: CRLF injection in multipart headers

## TL;DR
aiohttp: CRLF injection in multipart headers

## Key Points
- cve / CVE-2026-50269 / GHSA-m6qw-4cw2-hm4m / severity:CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U / aiohttp / PyPI

## Details
**Severity:** CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
**Advisory:** GHSA-m6qw-4cw2-hm4m (CVE-2026-50269)

**Affected (your watchlist):**
- `PyPI:aiohttp` 3.13.3 → fixed in 3.14.0 [docker/docker-strands]

**Details:**
### Summary

Attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar.

### Impact

In the unlikely situation that an application is passing user-controlled strings into `MultipartWriter.append(headers=...)` or `Payload.headers`, then an attacker may be able to modify the request to inject headers or change the contents of the request.

### Workaround

Sanitise such user input.

-----

Patch: https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8

**References:**
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m6qw-4cw2-hm4m
- https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8
- https://github.com/aio-libs/aiohttp

_Data: OSV.dev (upstream: ghsa) — https://osv.dev/vulnerability/GHSA-m6qw-4cw2-hm4m_

## Source
元記事: [CVE-2026-50269: aiohttp: CRLF injection in multipart headers](https://osv.dev/vulnerability/GHSA-m6qw-4cw2-hm4m) — published 2026-06-15T20:07:26Z