# CVE-2026-111063: AIOHTTP secure cookie enforcement bypass

Source: https://junglewise.ai/threats/cve-2026-111063-aiohttp-is-an-asynchronous-http-client-server-framework-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-111063 · Severity: low · Published 2026-10-19

AIOHTTP is an asynchronous HTTP client/server framework for Python. Prior to version 3.14.4, the framework fails to enforce the Secure attribute on cookies marked for encrypted transmission. An attacker can force a web browser or client to send sensitive cookies over unencrypted HTTP connections, exposing them to interception and theft.

Technologies: [Aio-Libs Aiohttp](https://junglewise.ai/threats/technologies/aio-libs-aiohttp), [aiohttp (PyPI)](https://junglewise.ai/threats/technologies/aiohttp). Vendors: [Aio-Libs](https://junglewise.ai/threats/vendors/aio-libs), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-111063 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111063 being exploited in the wild.

**How severe is CVE-2026-111063?** Low severity, published 19 October 2026.

**Which products and versions are affected?** Aio-Libs Aiohttp before 3.14.4; aiohttp (PyPI) <= 3.14.3, ECOSYSTEM:introduced=0,fixed=3.14.4.

**Is there a fix for CVE-2026-111063?** Yes. aiohttp (PyPI): upgrade to 3.14.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-111063 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-111063?** Check whether you run Aio-Libs Aiohttp or aiohttp (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- aiohttp (PyPI): upgrade to 3.14.4 or later

  ```sh
  pip install "aiohttp>=3.14.4"
  ```


## Technical details

AIOHTTP does not properly enforce the Secure cookie attribute, allowing cookies intended for HTTPS-only transmission to be sent over plain HTTP. This is a cookie handling vulnerability in the framework's HTTP client/server implementation. An attacker can exploit this by downgrading the connection or intercepting traffic to capture cookies marked Secure.

## Affected products

- aio-libs AIOHTTP before 3.14.4

## Identifiers

- CVE-2026-111063
- GHSA-494j-54xm-rwp3

## Timeline

- 2026-10-19: disclosed
- 2026-10-05: patched

## References

- [https://github.com/aio-libs/aiohttp/commit/999c356d61e966faffa97b06ab0d0455226d36c5](https://github.com/aio-libs/aiohttp/commit/999c356d61e966faffa97b06ab0d0455226d36c5)
- [https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4](https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4)

## Related threats

- [AIOHTTP WebSocket memory exhaustion via fragmented frames](https://junglewise.ai/threats/cve-2026-123817-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [aiohttp HTTP request smuggling in pure Python parser](https://junglewise.ai/threats/cve-2026-111750-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [aiohttp host-only cookie scope bypass in subdomain handling](https://junglewise.ai/threats/cve-2026-111749-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [aiohttp Request scheme manipulation in absolute-form requests](https://junglewise.ai/threats/cve-2026-111748-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [AIOHTTP multipart request file descriptor exhaustion](https://junglewise.ai/threats/cve-2026-111066-aiohttp-is-an-asynchronous-http-client-server-framework-for)