CVE-2026-54280
aiohttp: Payload Response Resources Are Not Closed After Mid-Body Disconnect
Description
### Summary Payload resources are not closed correctly when a client disconnects in the middle of a write. ### Impact If a payload is using an open file or similar limited resource, then an attacker may be able to cause resource starvation temporarily until garbage collection or similar closes the file. ----- Patch: https://github.com/aio-libs/aiohttp/commit/a762eda5242f6490d6ba667533193f8b473ad587
How to fix CVE-2026-54280
To remediate CVE-2026-54280, upgrade the affected package to a fixed version below.
- PyPI/aiohttp—upgrade to 3.14.1 or later
Is CVE-2026-54280 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-54280.
Affected packages (1)
- from 0, < 3.14.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U |