CVE•Published 2022-04-28•Modified 2026-07-09•1 article on news•6 live references•NVD data

CVE-2021-41945Encode · Httpx

Vulnerability data via NVD (ingested)

CVSS v3.1

9.1

CRITICAL

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

EPSS percentile

Exploit Prediction Scoring System · top 20% of all CVEs

Weaknesses (CWE)

CWE-20Improper Input Validation

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`.

Timeline

Published 2022-04-28

Modified 2026-07-09

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2021-41945

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Encode Httpx"

All exposed Encode Httpx instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Httpx"

HTTP body or banner mentions "Httpx" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2021-41945

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2021-41945

Censys host search filtered to this CVE id.

grep.app

CVE-2021-41945

Public source-code mentions — fast PoC discovery.

GitHub code

CVE-2021-41945

GitHub code search for direct mentions.

Google dork

"CVE-2021-41945" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2021-41945 on GitHub.