AIOHTTP Vulnerable to Deserialization of Untrusted Data

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Summary

CVECVE-2026-34993
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-02 20:16:34 UTC
Updated2026-06-05 13:44:31 UTC
DescriptionAIOHTTP 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.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.000680000 probability, percentile 0.212140000 (date 2026-06-10)

Problem Types: CWE-502 | CWE-502 CWE-502: Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Aiohttp Aiohttp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Aio-libs Aiohttp affected < 3.14.0 Not specified

References

ReferenceSourceLinkTags
github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00 [email protected] github.com Patch
github.com/aio-libs/aiohttp/security/advisories/GHSA-jg22-mg44-37j8 [email protected] github.com Mitigation, Patch, Vendor Advisory
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