CVE-2026-34518
2 advisories.
PyPI/aiohttp CVE-2026-34518: medium 5.3
AIOHTTP leaks Cookie and Proxy-Authorization headers on cross-origin redirect
Action: Upgrade aiohttp to 3.13.4 or later.
pip install aiohttp==3.13.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.13.4 | - |
Fixed versions
| 3.13.4 |
Sources
- osv: GHSA-966j-vmvw-g2g9
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-966j-vmvw-g2g9
- https://nvd.nist.gov/vuln/detail/CVE-2026-34518
- https://github.com/aio-libs/aiohttp/commit/5351c980dcec7ad385730efdf4e1f4338b24fdb6
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
CVE-2026-34518 · published · modified · JSON
PyPI/aiohttp CVE-2026-34518: medium 5.3
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 ret
Action: Upgrade aiohttp to 3.13.4 or later.
pip install aiohttp==3.13.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.13.4 | - |
Fixed versions
| 3.13.4 |
Sources
- osv: PYSEC-2026-2100
- https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
- https://github.com/aio-libs/aiohttp/commit/5351c980dcec7ad385730efdf4e1f4338b24fdb6
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-966j-vmvw-g2g9
CVE-2026-34518 · published · modified · JSON