MEDIUM

GHSA-hg6j-4rv6-33pg

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

Details

### 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.

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Patch: https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / aiohttp

Introduced in: 0 Fixed in: 3.14.0

Fix pip install --upgrade 'aiohttp>=3.14.0'

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg [WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-47265 [ADVISORY]
https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 [WEB]
https://github.com/aio-libs/aiohttp [PACKAGE]