CVE-2026-54273
aiohttp: HTTP/1 Pipelined Requests Queue Without Limit
Description
### Summary No limit was present on the number of pipelined requests that could be queued. ### Impact An attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to DoS. ----- Patch: https://github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf
How to fix CVE-2026-54273
To remediate CVE-2026-54273, upgrade the affected package to a fixed version below.
- PyPI/aiohttp—upgrade to 3.14.1 or later
Is CVE-2026-54273 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-54273.
Affected packages (1)
- from 0, < 3.14.1
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:H/SC:N/SI:N/SA:N/E:U |