WS-2026-0117
Published:October 07, 2026
Updated:October 13, 2026
aiohttp before 3.14.4: a Set-Cookie header with a huge Max-Age value raises an uncaught OverflowError while the client stores the cookie, and the response is never released, so a malicious server can exhaust the client's connector pool. (GHSA-6cjc-53gc-5rqm)
Affected Packages
aiohttp (CONDA):
Affected version(s) >=3.9.0 <3.14.4Fix Suggestion:
Update to version 3.14.4https://github.com/aio-libs/aiohttp.git (GITHUB):
Affected version(s) >=v3.9.0rc0 <v3.14.4Fix Suggestion:
Update to version v3.14.4aiohttp (PYTHON):
Affected version(s) >=3.9.0rc0 <3.14.4Fix Suggestion:
Update to version 3.14.4Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Missing Release of Resource after Effective Lifetime