Is CVE-2022-42252 in the CISA KEV catalog?

No. CVE-2022-42252 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-42252?

CVE-2022-42252 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-42252?

CVE-2022-42252 has an EPSS score of 1.45% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-42252?

Upgrade tomcat9 on debian 11 to 9.0.43-2~deb11u6 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2022-42252

HIGHEPSS 70th pctl

7.5

CVSS v3

NVD

Description

If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.

CWE-444

How to fix

Remediation Available

tomcat9Debian

Fixed in:9.0.43-2~deb11u6CVE-2022-42252

Fixed in:9.0.68-1CVE-2022-42252

libtomcat8-javaUbuntu

Fixed in:8.5.39-1ubuntu1~18.04.3+esm1USN-6880-1

libtomcat9-javaUbuntu

Fixed in:9.0.16-3ubuntu0.18.04.2+esm1USN-6880-1

Fixed in:9.0.31-1ubuntu0.5USN-6880-1

Fixed in:9.0.58-1ubuntu0.1+esm1USN-6880-1

tomcat8Ubuntu

Fixed in:8.5.39-1ubuntu1~18.04.3+esm1USN-6880-1

tomcat9Ubuntu

Fixed in:9.0.16-3ubuntu0.18.04.2+esm1USN-6880-1

Fixed in:9.0.31-1ubuntu0.5USN-6880-1

Fixed in:9.0.58-1ubuntu0.1+esm1USN-6880-1

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

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.45%probability of exploitation in 30 days

70thpercentile

Elevated risk: more likely to be exploited than 70% of all known CVEs.

References

Vendor Advisory1

lists.apache.org

Other references1

security.gentoo.org

Related Vulnerabilities

Other CWE-444 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-22536	Critical	10.0	98%	KEV	-
CVE-2025-61884	High	7.5	98%	KEV + Ransom	-
CVE-2020-9490	High	7.5	90%	-	Fix
CVE-2023-41265	Critical	9.6	85%	KEV + Ransom	-
CVE-2023-25690	Critical	9.8	84%	-	Fix
CVE-2022-32214	Medium	6.5	78%	-	Fix

Embed a live status badge for CVE-2022-42252

Markdown

[![CVE-2022-42252](https://tridentstack.com/cve/badge/CVE-2022-42252.svg)](https://tridentstack.com/cve/CVE-2022-42252)

HTML

<a href="https://tridentstack.com/cve/CVE-2022-42252"><img src="https://tridentstack.com/cve/badge/CVE-2022-42252.svg" alt="CVE-2022-42252"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2025-05-06.