CVE-2024-52303
HIGH7.5EPSS 0.42%aiohttp has a memory leak when middleware is enabled when requesting a resource with a non-allowed method
Published: 11/18/2024Modified: 2/4/2026
Description
### Summary A memory leak can occur when a request produces a `MatchInfoError`. This was caused by adding an entry to a cache on each request, due to the building of each `MatchInfoError` producing a unique cache entry. ### Impact If the user is making use of any middlewares with `aiohttp.web` then it is advisable to upgrade immediately. An attacker may be able to exhaust the memory resources of a server by sending a substantial number (100,000s to millions) of such requests. ----- Patch: https://github.com/aio-libs/aiohttp/commit/bc15db61615079d1b6327ba42c682f758fa96936
Affected packages (2)
- Debian/python-aiohttpfrom 0, < 3.10.11-1
- PyPI/aiohttp>= 3.10.6, < 3.10.11
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-52303
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-52303
- PATCHhttps://github.com/aio-libs/aiohttp
- WEBhttps://github.com/aio-libs/aiohttp/commit/bc15db61615079d1b6327ba42c682f758fa96936
- WEBhttps://github.com/aio-libs/aiohttp/security/advisories/GHSA-27mf-ghqm-j3j8