GHSA-2g87-pp6c-29x5 aiohttp: Multiple instances of excessive or unbounded memory/CPU use
Attackers can cause resource exhaustion via specially crafted requests, leading to denial of service in applications using the aiohttp library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-2g87-pp6c-29x5?
GHSA-2g87-pp6c-29x5 is a denial of service vulnerability in aiohttp, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Summary
Multiple cases were found where aiohttp could use excessive or unbounded memory, or excessive CPU consumption on attacker controlled requests.
Impact
An attacker could cause resource exhaustion through specially crafted requests.
Which versions are affected by GHSA-2g87-pp6c-29x5?
2 open source packages ship an affected version, including aiohttp.
| Package | Affected | Fixed in |
|---|---|---|
aiohttp PyPI | All versions | 3.14.4 |
aiohttp PyPI | All versions | 3.14.4 |
How do I fix GHSA-2g87-pp6c-29x5?
Upgrade aiohttp to 3.14.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GHSA-2g87-pp6c-29x5 being exploited?
There is no known exploitation of GHSA-2g87-pp6c-29x5 in the wild and no public exploit code.