Information Exposure Affecting aiohttp package, versions [,3.13.4)
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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- published2 Apr 2026
- disclosed1 Apr 2026
- credituug4na
Introduced: 1 Apr 2026
CVE-2026-34518 (opens in a new tab)How to fix?
Upgrade aiohttp to version 3.13.4 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure in the handling of cross-origin redirects, where Cookie and Proxy-Authorization headers are not properly removed. An attacker can obtain sensitive information by causing a user to follow a redirect to a malicious origin.