CVE-2026-34993
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.
02 / AFFECTED SOFTWARE
Affected packages
306 explicit affected versions
306 explicit affected versions
148 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
### 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
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.
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.
05 / REFERENCES
Further evidence
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jg22-mg44-37j8
- https://nvd.nist.gov/vuln/detail/CVE-2026-34993
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/errata/RHSA-2026:34456
- https://access.redhat.com/errata/RHSA-2026:37275
- https://access.redhat.com/security/cve/CVE-2026-34993
- https://bugzilla.redhat.com/show_bug.cgi?id=2484099
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34993.json
- https://access.redhat.com/errata/RHSA-2026:42644
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:50319
- https://access.redhat.com/errata/RHSA-2026:50336
- https://access.redhat.com/errata/RHSA-2026:50340
- https://access.redhat.com/errata/RHSA-2026:50357
- https://access.redhat.com/errata/RHSA-2026:50479
- https://access.redhat.com/errata/RHSA-2026:54760
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34993.json