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The vulnerability resides within the AIOHTTP asynchronous HTTP client and server framework, specifically concerning how cookie handling mechanisms manage the Secure attribute when dealing with shared cookies across requests and sessions.
When a shared cookie object is utilized within the client session, the framework fails to properly enforce or verify the Secure flag before transmission.
Consequently, cookies that were originally intended to be restricted exclusively to encrypted HTTPS channels can potentially be sent over plain, unencrypted HTTP connections under specific request forwarding or shared state conditions.
This oversight violates strict transport security boundaries, enabling potential leakage of sensitive session identifiers or authentication tokens if traffic is intercepted or redirected over unencrypted channels.
The flaw stems from improper attribute propagation within the shared cookie jar implementation, where cookie metadata such as the secure constraint is omitted or ignored during serialization or transmission phases.
Developers relying on default cookie sharing behaviors inherit this risk, as confidentiality guarantees break down when secure-flagged cookies traverse insecure sockets.
Remediation requires updating the framework version and ensuring proper flag validation checks are strictly enforced by the underlying cookie management logic to prevent unauthorized exposure.
DailyCVE Form:
Platform: AIOHTTP Python
Version: Up to 3.14.3
Vulnerability: Cookie Secure missing
Severity: Low severity
Date: October 7, 2026
Prediction: Patch already released
What Undercode Say:
pip install --upgrade aiohttp python -c "import aiohttp; print(aiohttp.<strong>version</strong>)"
Exploit: (Educational Purposes!)
An attacker can exploit this weakness by forcing or intercepting unencrypted traffic requests where shared cookies marked as secure are transmitted over plain HTTP. If an application shares cookie jars across insecure endpoints, the missing flag enforcement allows interception of sensitive authentication data without triggering transport layer security blocks.
Protection: from this CVE
Upgrade the AIOHTTP package to the latest patched version where the shared cookie handling logic properly enforces the Secure attribute constraint across all transmission channels.
Impact:
It may be possible to send a shared cookie marked Secure through an unencrypted request, leading to potential session token exposure over insecure network connections.
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Sources:
Reported By: github.com
Extra Source Hub:
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