CVE-2026-34993
highpriority · track · 29EPSS 0.002 · 7 %ileEUFRRUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (33)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- GHSA-jg22-mg44-37j8AIOHTTP is Vulnerable to Deserialization of Untrusted Data2026-06-03ghsa · osvUS
### Summary Using ``CookieJar.load()`` with untrusted input may allow arbitrary code execution. ### Impact Most applications using this function will be doing so with the user's own data, so this is unlikely to affect many applications. ### Workaround If an application does allow attacker controlled files to be loaded, a workaround on older releases would be to sanitise the files before loading. ----- Patch: https://github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
- PYSEC-2026-21042026-06-02vendor · osvUS
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.
also known as (7)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (30)
External citations — patches, advisories, analysis.
- https://docs.aiohttp.org/en/stable/Patchcnnvd
- https://github.com/aio-libs/aiocnnvd
- https://github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00enisa_euvd
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jg22-mg44-37j8enisa_euvd
- https://access.redhat.com/errata/RHSA-2026:24977nvd
- https://access.redhat.com/errata/RHSA-2026:34456nvd
- https://access.redhat.com/errata/RHSA-2026:37275nvd
- https://access.redhat.com/errata/RHSA-2026:42644nvd
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