Affected: Homebrew: aider

### Summary

The C parser (the default for most installs) accepted null bytes and control characters in request headers.

### Impact

An attacker could send header values that are interpreted differently than expected due to the presence of control characters. For example, `request.url.origin()` may return a different value than the raw Host header, or what a reverse proxy interpreted it as., potentially resulting in some kind of security bypass.

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Patch: https://github.com/aio-libs/aiohttp/commit/9370b9714a7a56003cacd31a9b4ae16eab109ba4

Withdrawn by the publisher.

Affected: CleanStart: airflow-2

Multiple security vulnerabilities affect the airflow-2 package. These issues are resolved in later releases. See references for individual vulnerability details.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.

Affected: PyPI: aiohttp

### Summary

The C parser (the default for most installs) accepted null bytes and control characters in request headers.

### Impact

An attacker could send header values that are interpreted differently than expected due to the presence of control characters. For example, `request.url.origin()` may return a different value than the raw Host header, or what a reverse proxy interpreted it as., potentially resulting in some kind of security bypass.

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Patch: https://github.com/aio-libs/aiohttp/commit/9370b9714a7a56003cacd31a9b4ae16eab109ba4

Affected: openEuler:24.03-LTS-SP1: python-aiohttp

Async http client/server framework (asyncio). Security Fix(es):

Insufficient restrictions in header/trailer handling could cause uncapped memory usage.(CVE-2026-22815)

An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.(CVE-2026-34513)

An attacker who controls the content_type parameter in aiohttp could use this to inject extra headers or similar exploits.(CVE-2026-34514)

A response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability.(CVE-2026-34516)

For some multipart form fields, aiohttp read the entire field into memory before checking client_max_size.(CVE-2026-34517)

When following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers.(CVE-2026-34518)

aiohttp is vulnerable to HTTP response splitting attacks. An attacker can insert carriage return (\r) characters in the reason phrase to craft malicious responses, leading to response splitting attacks. This vulnerability affects aiohttp versions up to and including 3.13.3.(CVE-2026-34519)

The llhttp parser in aiohttp accepts null bytes and control characters in response header values, which could allow attackers to perform HTTP header injection attacks and bypass security restrictions.(CVE-2026-34520)

aiohttp is a Python asynchronous HTTP client/server framework. In version 3.13.3 and earlier, there is a sec…

python311-aiohttp-3.13.5-3.1 on GA media

Affected: PyPI: aiohttp

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.

Security update for python-aiohttp

Affected: Ubuntu:Pro:16.04:LTS: python-aiohttp, Ubuntu:Pro:18.04:LTS: python-aiohttp, Ubuntu:Pro:20.04:LTS: python-aiohttp, Ubuntu:Pro:22.04:LTS: python-aiohttp, Ubuntu:Pro:24.04:LTS: python-aiohttp, Ubuntu:25.10: python-aiohttp, Ubuntu:Pro:26.04:LTS: python-aiohttp

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.

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