AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Set-Cookie parsing treats unrecognized name=value attributes as additional cookies, while CookieJar does not limit the number of cookies stored or sent. A malicious server can make an aiohttp client accumulate a very large cookie set, consume memory and CPU repeatedly across redirects, and construct an excessively large Cookie header for later requests to the same domain. This issue is fixed in version 3.14.4.
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Affected Vendors & Products
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Solution
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References
History
Fri, 13 Nov 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Aio-libs
Aio-libs aiohttp |
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| Vendors & Products |
Aio-libs
Aio-libs aiohttp |
Fri, 13 Nov 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Set-Cookie parsing treats unrecognized name=value attributes as additional cookies, while CookieJar does not limit the number of cookies stored or sent. A malicious server can make an aiohttp client accumulate a very large cookie set, consume memory and CPU repeatedly across redirects, and construct an excessively large Cookie header for later requests to the same domain. This issue is fixed in version 3.14.4. | |
| Title | AIOHTTP: Unbounded cookie storage in client CookieJar | |
| Weaknesses | CWE-1325 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-11-13T21:24:58.089Z
Reserved: 2026-11-12T22:42:47.032Z
Link: CVE-2026-128125
No data.
Status : Awaiting Analysis
Published: 2026-11-13T21:17:44.157
Modified: 2026-11-13T22:17:23.313
Link: CVE-2026-128125
No data.
OpenCVE Enrichment
Updated: 2026-11-14T08:30:09Z
Weaknesses