AIOHTTP <3.14: CookieJar.load() RCE via untrusted input
CVE-2026-34993 Published on June 2, 2026
AIOHTTP Vulnerable to Deserialization of Untrusted Data
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.
Vulnerability Analysis
CVE-2026-34993 can be exploited with local system access, requires user interaction and user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Privileges Required:
HIGH
User Interaction:
REQUIRED
Confidentiality Impact:
HIGH
Availability Impact:
HIGH
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-34993 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-34993
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Affected Versions
aio-libs
aiohttp:
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Version < 3.14.0
is affected.
Red Hat OpenShift AI 2.25:
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Version 1780078807 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1780078840 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1780069179 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1780069181 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1783082430 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1783024305 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1783701598 and below *
is unaffected.
Red Hat OpenShift AI 2.25:
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Version 1783091175 and below *
is unaffected.
Red Hat OpenShift AI 3.3:
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Version 1782887848 and below *
is unaffected.
Red Hat OpenShift AI 3.3:
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Version 1782472374 and below *
is unaffected.
Red Hat OpenShift AI 3.4:
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Version 1782726504 and below *
is unaffected.
Red Hat OpenShift AI 3.4:
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Version 1782132167 and below *
is unaffected.
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Version 1782132207 and below *
is unaffected.
Red Hat OpenShift AI 3.4:
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Version 1782132237 and below *
is unaffected.
Red Hat OpenShift AI 3.4:
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Version 1782132240 and below *
is unaffected.
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Version 1782132286 and below *
is unaffected.
Red Hat OpenShift AI 3.4:
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Version 1782132236 and below *
is unaffected.
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Version 1782132163 and below *
is unaffected.
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Version 1782132297 and below *
is unaffected.
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Version 1782133907 and below *
is unaffected.
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.
