Reading multiple invalid cookies can lead to a logging storm.
If the cookies attribute is accessed in an application, then an attacker may be able to trigger a storm of warning-level logs using a specially crafted Cookie header.
Patch: https://github.com/aio-libs/aiohttp/commit/64629a0834f94e46d9881f4e99c41a137e1f3326
{
"severity": "LOW",
"github_reviewed_at": "2026-01-05T23:13:46Z",
"cwe_ids": [
"CWE-779"
],
"nvd_published_at": "2026-01-06T00:15:48Z",
"github_reviewed": true
}