CVE-2026-34518
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
12th
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4.
| CWE | CWE-200 |
| Vendor | aio-libs |
| Product | aiohttp |
| Published | Apr 1, 2026 |
| Last Updated | Apr 2, 2026 |
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Affected Versions
aio-libs / aiohttp
< 3.13.4