GHSA-2fqr-mr3j-6wp8

aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

At a glance

Published: 2026-06-15 20:08 UTC
Updated: 2026-09-10 03:51 UTC
CVE: CVE-2026-54279
Aliases: PYSEC-2026-2112
CVSS_V4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U

Description

### 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

Affected packages

Package	Versions
PyPI · aiohttp	introduced 0, fixed 3.14.1

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2fqr-mr3j-6wp8 WEB
https://github.com/aio-libs/aiohttp PACKAGE

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — GitHub Advisory Database