CVE-2026-47265: AIOHTTP is vulnerable to cross-origin redirect with per-request cookies

June 3, 2026

Cookies set with the cookies parameter on requests are sent after following a cross-origin redirect.

References

github.com/advisories/GHSA-hg6j-4rv6-33pg
github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478
github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg
nvd.nist.gov/vuln/detail/CVE-2026-47265

Code Behaviors & Features

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