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GHSA-hg6j-4rv6-33pg

AIOHTTP is vulnerable to cross-origin redirect with per-request cookies

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-47265

Packages

EcosystemPackageAffectedFixed in
PyPI aiohttp < 3.14.0 3.14.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Summary Cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. ### Impact If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. ### Workaround If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable. ----- Patch: https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478

References

External links from the advisory. They lead to third-party sites.