Is CVE-2021-41945 in the CISA KEV catalog?

No. CVE-2021-41945 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-41945?

CVE-2021-41945 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2021-41945?

CVE-2021-41945 has an EPSS score of 2.18% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-41945?

Upgrade httpx on debian 12 to 0.23.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-41945

CRITICALEPSS 80th pctl

9.1

CVSS v3

NVD

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`.

CWE-20Improper Input Validation

How to fix

Remediation Available

httpxDebian

Fixed in:0.23.0-1CVE-2021-41945

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

2.18%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Exploit3

Vendor Advisory1

encode.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-05.