CVE-2026-111063: CWE-311: Missing Encryption of Sensitive Data in aio-libs aiohttp
Description
AIOHTTP versions prior to 3.14.4 do not enforce the Secure attribute on shared cookies, allowing these cookies to be sent over unencrypted HTTP requests. This vulnerability is addressed in version 3.14.4.
CVSS v4.0
Score 6.3medium
Affected software
aio-libs
aiohttp
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in aiohttp, an asynchronous HTTP client/server framework for Python, involves the improper enforcement of the Secure attribute on shared cookies before version 3.14.4. Specifically, cookies marked as Secure can be transmitted over unencrypted HTTP connections, potentially exposing sensitive cookie data. This issue corresponds to CWE-311 (Missing Encryption of Sensitive Data) and CWE-1004. The problem is fixed in aiohttp version 3.14.4.
Potential Impact
An attacker could cause a shared cookie marked Secure to be sent over an unencrypted connection, increasing the risk of cookie interception and potential session hijacking or data leakage. The CVSS 4.0 base score is 6.3, indicating a medium severity impact.
Mitigation Recommendations
Upgrade aiohttp to version 3.14.4 or later, where the Secure attribute enforcement on shared cookies is properly implemented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-15T12:47:13.665Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad64dbc2cdf04f656724f88
Added to database: 10/19/2026, 17:05:00 UTC
Last enriched: 10/19/2026, 17:18:31 UTC
Last updated: 10/19/2026, 17:19:11 UTC
Views: 4
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