aiohttp: Connector pool exhaustion via Max-Age overflow
Summary
An overflow in Max-Age processing in aiohttp can skip closing a connection.
Impact
An attacker may be able to exhaust the connection pool temporarily, until garbage collection resolves the connections.
What to do
Upgrade aiohttp to version 3.14.4 or later.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | aiohttp | < 3.14.4 | 3.14.4 |
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm
- https://nvd.nist.gov/vuln/detail/CVE-2026-111065
- https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-770- Platform
- Python (PyPI)
- Package
aiohttp- Disclosed
- 20.10.2026
- Updated
- 20.10.2026 23:24
Sources and licenses · Edited or translated by DockRay; source rights and applicable licenses are retained.
OSV / GitHub Advisory Database - GHSA-6cjc-53gc-5rqm - CC BY 4.0
Vulnerability history: aiohttp
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 55
- First → latest
- 02.2021 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 7
- Medium 29
- Low 19
Disclosures per year
- 2021: 1
- 2022: 0
- 2023: 6
- 2024: 7
- 2025: 1
- 2026: 40
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