Improper Input Validation Affecting tomcat9 package, versions <9.0.70-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
5.85% (93rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-TOMCAT9-18001075
  • published17 Jul 2026
  • disclosed10 Oct 2023

Introduced: 10 Oct 2023

CVE-2023-45648  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Echo:latest tomcat9 to version 9.0.70-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat9 package and not the tomcat9 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header 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-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.

CVSS Base Scores

version 3.1