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Low severityGHSA Advisory· Published Jun 15, 2026· Updated Jun 15, 2026

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

CVE-2026-54279

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.

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
aiohttpPyPI
< 3.14.13.14.1

Affected products

31

Patches

Vulnerability mechanics

References

2

News mentions

1