CVE-2022-42252· NVD / CVE Program· CNA apache

Apache Tomcat request smuggling via malformed content-length

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.

HighCVSS 7.5 · v3.1—No exploit Fix available

Pre-auth

Published: Nov 1, 2022
Updated: Jun 17, 2026
EPSS: 1.5% · 74th percentile
CWE: CWE-444

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.5%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Affected systems

Vendor	Product	CPE
apache	tomcat	cpe:2.3:a:apache:tomcat

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

apache tomcat8.5.0 and later · before 8.5.83
apache tomcat9.0.0 and later · before 9.0.68
apache tomcat10.0.0 and later · before 10.0.27
apache tomcat10.1.0 and later · before 10.1.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

Apache Software Foundation Apache Tomcat
- 10.1.0-M1 and later · up to and including 10.1.0affected · maven
- 10.0.0-M1 and later · up to and including 10.0.26affected · maven
- 9.0.0-M1 and later · up to and including 9.0.67affected · maven
- 8.5.0 and later · up to and including 8.5.82affected · maven

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:10	tomcat9	before 9.0.31-1~deb10u8	9.0.31-1~deb10u8
Debian:11	tomcat9	before 9.0.43-2~deb11u6	9.0.43-2~deb11u6
Debian:12	tomcat9	before 9.0.68-1	9.0.68-1
Maven	org.apache.tomcat:tomcat-coyote	from 10.0.0-M1 · before 10.0.27	10.0.27
Maven	org.apache.tomcat:tomcat-coyote	from 10.1.0-M1 · before 10.1.1	10.1.1
Maven	org.apache.tomcat:tomcat-coyote	from 9.0.0-M1 · before 9.0.68	9.0.68
Maven	org.apache.tomcat.embed:tomcat-embed-core	from 10.0.0-M1 · before 10.0.27	10.0.27
Maven	org.apache.tomcat.embed:tomcat-embed-core	from 10.1.0-M1 · before 10.1.1	10.1.1
Maven	org.apache.tomcat.embed:tomcat-embed-core	from 8.5.0 · before 8.5.83	8.5.83
Maven	org.apache.tomcat.embed:tomcat-embed-core	from 9.0.0-M1 · before 9.0.68	9.0.68
openSUSE:Tumbleweed	tomcat	before 9.0.43-11.1	9.0.43-11.1
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-admin-webapps	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-docs-webapp	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-el-3.0-api	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-java-jdk11	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-java-jdk8	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-javadoc	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-jsp-2.3-api	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-lib	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-selinux	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-servlet-4.0-api	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el7	jws5-tomcat-webapps	before 0:9.0.62-13.redhat_00011.1.el7jws	0:9.0.62-13.redhat_00011.1.el7jws
Red Hat:jboss_enterprise_web_server:5.7::el8	jws5-tomcat	before 0:9.0.62-13.redhat_00011.1.el8jws	0:9.0.62-13.redhat_00011.1.el8jws

+24

Same product

apache: all records

Other highest-scoring records for the same primary product.

CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV
99Now
CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV
96Now
CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV
92Now
CVE-2017-12615When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g.KEV
92Now
CVE-2026-34486Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptorKEV
62This week
CVE-2019-0232When running on Windows with enableCmdLineArguments enabled, the CGI Servlet in Apache Tomcat 9.0.0.M1 to 9.0.17, 8.5.0 to 8.5.39 and 7.0.0
62This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:tomcat9	9.0.68-1 · Debian:12	Package registry (OSV)
Maven:org.apache.tomcat:tomcat-coyote	10.0.27	Package registry (OSV)
Maven:org.apache.tomcat:tomcat-coyote	10.1.1	Package registry (OSV)
Maven:org.apache.tomcat:tomcat-coyote	9.0.68	Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core	10.0.27	Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core	10.1.1	Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core	8.5.83	Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-core	9.0.68	Package registry (OSV)
opensuse:tomcat	9.0.43-11.1 · openSUSE:Tumbleweed	Package registry (OSV)
red hat:jws5-tomcat	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-admin-webapps	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-docs-webapp	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-el-3.0-api	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-java-jdk11	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-java-jdk8	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-javadoc	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-jsp-2.3-api	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-lib	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-selinux	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-servlet-4.0-api	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
red hat:jws5-tomcat-webapps	0:9.0.62-13.redhat_00011.1.el7jws · Red Hat:jboss_enterprise_web_server:5.7::el7	Package registry (OSV)
suse:tomcat	8.0.53-29.57.1 · SUSE:Linux Enterprise Server 12 SP2-BCL	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Sam Shahsavar

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records