CVE-2021-41945
CRITICALCVSS 9.1/10EPSS 2.18%
Last modified
CVE-2021-41945 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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`.. EPSS estimates a 2.18% chance of exploitation in the next 30 days.
Description
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`.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Encode | Httpx | < 0.23.0 |
References
- https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571Exploit, Third Party Advisory
- https://github.com/encode/httpxProduct, Third Party Advisory
- https://github.com/encode/httpx/discussions/1831Exploit, Issue Tracking, Third Party Advisory
- https://github.com/encode/httpx/issues/2184Exploit, Issue Tracking, Third Party Advisory
- https://github.com/encode/httpx/releases/tag/0.23.0Release Notes, Third Party Advisory
- https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571Exploit, Third Party Advisory
- https://github.com/encode/httpxProduct, Third Party Advisory
- https://github.com/encode/httpx/discussions/1831Exploit, Issue Tracking, Third Party Advisory
- https://github.com/encode/httpx/issues/2184Exploit, Issue Tracking, Third Party Advisory
- https://github.com/encode/httpx/releases/tag/0.23.0Release Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-41945?
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`.
How severe is CVE-2021-41945?
CVE-2021-41945 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41945?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-41945?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST