Medium 6.3Published Oct 19, 2026

CVE-2026-111063AIOHTTP: Secure attribute not enforced for shared cookie

Updated under an hour ago (2026-10-21 04:20 UTC)

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It affects aio-libs aiohttp. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the Secure attribute for a shared cookie is not enforced. An attacker can consequently cause a shared cookie marked Secure to be sent with an unencrypted request. This issue is fixed in version 3.14.4.

CVSS: 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-311, CWE-1004
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

aio-libs aiohttp aio_libs:aiohttp (from the name)	before 3.14.4	CNA record

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-494j-54xm-rwp3x-refsource-confirm
https://github.com/aio-libs/aiohttp/commit/999c356d61e966faffa97b06ab0d0455226d36c5x-refsource-misc
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.