A AegiFlow
HIGHCVSS 7.5EPSS 2.7%

CVE-2023-46589

Apache Tomcat Improper Input Validation vulnerability

Published
2023-11-28
Modified
2026-10-02
EPSS percentile
85%
Aliases
GHSA-fccv-jmmp-qg76
Sources
github-advisory

Summary

Improper Input Validation vulnerability in Apache Tomcat. Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82, and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.

Affected packages

EcosystemPackageAffected versionsFixed versions
Mavenorg.apache.tomcat.embed:tomcat-embed-core—11.0.0-M11, 10.1.16, 9.0.83, 8.5.96
Mavenorg.apache.tomcat:tomcat-catalina—11.0.0-M11, 10.1.16, 9.0.83, 8.5.96
Mavenorg.apache.tomcat:tomcat-coyote—11.0.0-M11

Remediation: Upgrade to 11.0.0-M11 or later.

References

Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.

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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.