CVE-2026-34993
AIOHTTP is Vulnerable to Deserialization of Untrusted Data
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, using ``CookieJar.load()`` with untrusted input may allow arbitrary code execution. Most applications using this function will be doing so with the user's own data, so this is unlikely to affect many applications. Version 3.14.0 patches the issue. If an application does allow attacker controlled files to be loaded, a workaround on older releases would be to sanitize the files before loading.
How to fix CVE-2026-34993
To remediate CVE-2026-34993, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 3.14.0 or later
Is CVE-2026-34993 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-34993.
Affected packages (2)
- from 0
- from 0, < 3.14.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L |