Improper Resource Shutdown or Release in aiohttp - CVE-2026-54280
Published: June 9, 2026
Vulnerability identifier: #VU133991
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-54280
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: aio-libs
Affected software:
aiohttp
aiohttp
Detailed vulnerability description
The vulnerability allows a remote attacker to cause resource starvation.
The vulnerability exists due to improper resource shutdown in payload response handling when a client disconnects in the middle of a write. A remote attacker can disconnect during a response body write to cause resource starvation.
The issue can temporarily exhaust open files or similar limited resources until garbage collection or similar cleanup occurs.
How to mitigate CVE-2026-54280
Install security update from vendor's website.