aio-libs aiohttp Uncontrolled Resource Consumption Flaw (CVE-2026-111066) Rated CVSS 8.2
A newly published high vulnerability in aio-libs aiohttp carries a CVSS score of 8.2. Here is what is affected and how to respond.
Key points
- CVE-2026-111066 affects aio-libs aiohttp.
- CVSS 8.2 (High).
- No exploitation confirmed yet.
A high uncontrolled resource consumption tracked as CVE-2026-111066 has been published in the National Vulnerability Database for aio-libs aiohttp, with a CVSS base score of 8.2.
At a glance
- CVE
- CVE-2026-111066
- Product
- aio-libs aiohttp
- CVSS
- 8.2 High
- Weakness
- uncontrolled resource consumption
- Exploited
- No known exploitation
What is the vulnerability?
The NVD entry states: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. From 2 until 3.14.4, multipart request processing can retain an unbounded number of open file descriptors. An unauthenticated attacker can consequently exhaust file descriptors with specially crafted multipart requests when a handler uses Request.post(). This issue is fixed in version 3.14.4.
Affected versions
| Vendor | Product | Versions |
|---|---|---|
| Aio-Libs | aiohttp | >= 2, < 3.14.4 |
Is it being exploited?
There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.
What should you do?
- Identify whether the affected product and versions run in your environment.
- Apply the vendor update listed in the advisory as soon as it is available.
- Limit network exposure of the affected service until it is patched.
- Monitor the vendor advisory for updated guidance or exploitation reports.
What to do and how to stay safe: CVE-2026-111066
- Vulnerability severity scores ignore your specific architecture and context.
- Exploitability depends on network exposure and user behavior, not just code flaws.
- Prioritization requires continuous asset inventory and threat intelligence alignment.
Risk-based vulnerability management focuses your limited resources on the flaws that actually threaten your business. Start by mapping your critical assets and checking for active exploits to prioritize your backlog.
Step-by-step guide: Risk-Based Vulnerability Management: Prioritize Fixes by Actual Danger
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-111066?
CVE-2026-111066 is a uncontrolled resource consumption vulnerability in aio-libs aiohttp.
How severe is CVE-2026-111066?
It has a CVSS score of 8.2 High.
Is CVE-2026-111066 being exploited?
There is no public confirmation of exploitation at the time of publication.
