CVE-2021-41945

9.1 criticalEPSS 2.1%

Critical (9.1) in encode httpx. EPSS 2.1% chance of exploitation in the next 30 days. Fixed in httpx 0.20.0, 0.23.0.

Encode OSS httpx < 0.23.0 is affected by improper input validation in `httpx.URL`, `httpx.Client` and some functions using `httpx.URL.copy_with`.

Severity

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2022-04-28
Modified: 2026-07-09
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-h8pj-cxx2-jfg2	PyPI	httpx	<0.23.0	0.23.0
PYSEC-2022-183	PyPI	httpx	<0.20.0	0.20.0