aio-libs/aiohttp · Security
AIOHTTP Affected by Denial of Service (DoS) via Unbounded DNS Cache in TCPConnector
- GHSA ID
- GHSA-hcc4-c3v8-rx92
- CVE ID
- CVE-2026-34513
- Severity
- low
- Published
- Updated
- CVSS v4
- 2.7 · 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/E:U
Description
Summary
An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.
Impact
If an application makes requests to a very large number of hosts, this could cause the DNS cache to continue growing and slowly use excessive amounts of memory.
Patch: https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98
CWEs
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hcc4-c3v8-rx92 ↗
- https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-34513 ↗
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4 ↗
- https://github.com/advisories/GHSA-hcc4-c3v8-rx92 ↗