CVE-2026-54279

Updated on 15 Jun 2026

Severity

Awaiting Analysis

Details

Overview

About vulnerability

Summary

Host-only cookies that are saved with CookieJar.save() and then restored later with CookieJar.load() lose their host-only status.

Impact

Host-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed.


Patch: https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2

Details

Affected packages:
aiohttp @ 3.10.11 (+5 more)

Summary

Host-only cookies that are saved with CookieJar.save() and then restored later with CookieJar.load() lose their host-only status.

Impact

Host-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed.


Patch: https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2