PyPI/aiohttp CVE-2021-21330: low 3.1, EPSS 1.91%

`aiohttp` Open Redirect vulnerability (`normalize_path_middleware` middleware)

Action: Upgrade aiohttp to 3.7.4 or later.

pip install aiohttp==3.7.4

Affected

Fixed versions

Sources

• osv: GHSA-v6wp-4m6f-gcjg
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-v6wp-4m6f-gcjg
• https://nvd.nist.gov/vuln/detail/CVE-2021-21330
• https://github.com/aio-libs/aiohttp/commit/2545222a3853e31ace15d87ae0e2effb7da0c96b
• https://github.com/aio-libs/aiohttp
• https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst#374-2021-02-25
• https://github.com/pypa/advisory-database/tree/main/vulns/aiohttp/PYSEC-2021-76.yaml
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU7ENI54JNEK3PHEFGCE46DGMFNTVU6L
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN3V7CZJRT4QFCVXB6LDPCJH7NAOFCA5
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU7ENI54JNEK3PHEFGCE46DGMFNTVU6L
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JN3V7CZJRT4QFCVXB6LDPCJH7NAOFCA5
• https://pypi.org/project/aiohttp
• https://security.gentoo.org/glsa/202208-19
• https://www.debian.org/security/2021/dsa-4864

CVE-2021-21330 · published 2021-02-26T02:11:57Z · modified 2026-07-08T06:27:43.955932046Z · JSON