PT-2026-49593 · Pypi · Aiohttp

Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-54279

OSV

CVSS v4.0

1.3

Low

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U

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

Fix

Improper Initialization

Weakness Enumeration

CWE-665

Related Identifiers

CVE-2026-54279

GHSA-2FQR-MR3J-6WP8

Affected Products

Aiohttp

References · 3

• https://osv.dev/vulnerability/GHSA-2fqr-mr3j-6wp8 · Vendor Advisory
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2fqr-mr3j-6wp8 · Note
• https://github.com/aio-libs/aiohttp · Note