Sensitive Cookie Without "HttpOnly" Flag Affecting aiohttp package, versions [,3.14.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Oct 2026
- disclosed19 Oct 2026
- creditEurico Nicacio
Introduced: 19 Oct 2026
NewCVE-2026-111063 (opens in a new tab)How to fix?
Upgrade aiohttp to version 3.14.4 or higher.
Overview
Affected versions of this package are vulnerable to Sensitive Cookie Without "HttpOnly" Flag via CookieJar.filter_cookies(), which fails to suppress shared cookies (cookies without a Domain attribute) that carry the Secure flag when the outgoing request uses an unencrypted connection. An attacker in a MitM position on the network can intercept these cookies, which were intended to be transmitted only over HTTPS.