Integer overflow in aiohttp - #VU153859
Published: October 7, 2026
Vulnerability identifier: #VU153859
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: N/A
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to temporarily exhaust the connection pool.
The vulnerability exists due to an overflow in Max-Age processing when handling Max-Age values. A remote attacker can trigger an overflow that prevents a connection from closing to temporarily exhaust the connection pool.
Garbage collection eventually resolves the unclosed connections.
Affected software
aiohttp
Remediation
Install security update from vendor's website.
aiohttp - update to 3.14.4