Cookie Security Issue in AIOHTTP Framework by AIOLIBS
CVE-2026-111063

6.3MEDIUM

Key Information:

Vendor

Aio-libs

Status
Aiohttp
Vendor
CVE Published:
19 October 2026

What is CVE-2026-111063?

AIOHTTP, an asynchronous HTTP client/server framework for Python, has a vulnerability where the Secure attribute for a shared cookie is not properly enforced in versions before 3.14.4. This flaw allows an attacker to exploit unencrypted requests, potentially leading to the exposure of sensitive cookie data. Users of AIOHTTP are advised to update to version 3.14.4 or later to mitigate this issue.

Affected Version(s)

aiohttp < 3.14.4

References

https://github.com/aio-libs/aiohttp/security/advisories/G...
x_refsource_CONFIRM
https://github.com/aio-libs/aiohttp/commit/999c356d61e966...
x_refsource_MISC
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4
x_refsource_MISC

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.