PatchTheCVECVE-2026-34993: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
CVE-2026-34993 is a medium-severity flaw (CVSS 6.4) affecting aiohttp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 releas
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.4 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | High |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 93%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-06-02 |
| Last modified | 2026-09-04 |
Last updated 2026-09-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34993?
aiohttp: upgrade to 3.14.0. Exact commands for each OS are on this page.
Is CVE-2026-34993 being exploited?
CVE-2026-34993 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34993 affect?
CVE-2026-34993 affects aiohttp. Severity is medium (CVSS 6.4). 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
How urgent is CVE-2026-34993?
Priority 24/100. No elevated risk signals yet.
Software pages
Related CVEs
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