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CVE-2026-34993

AIOHTTP Vulnerable to Deserialization of Untrusted Data

Published: Jun 2, 2026Updated: Jun 2, 2026 Sources: CVE List
NVD MITRE
6.4CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:LAC:HPR:HUI:RS:CC:LI:HA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:LAvailability
Low

Weaknesses

CWE-502CWE-502: Deserialization of Untrusted Data

Affected Products

aiohttp
aio-libs

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jg22-mg44-37j8
github.com
https://github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00
github.com

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