Incorrect Behavior Order: Authorization Before Parsing and Canonicalization Affecting tomcat9-jsp-2.3-api package, versions <1:9.0.118-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.84% (54th percentile)

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  • Snyk IDSNYK-AMZN2023-TOMCAT9JSP23API-17290777
  • published10 Jun 2026
  • disclosed12 May 2026

Introduced: 12 May 2026

CVE-2026-43515  (opens in a new tab)
CWE-551  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 tomcat9-jsp-2.3-api to version 1:9.0.118-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1770.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat9-jsp-2.3-api package and not the tomcat9-jsp-2.3-api package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

CVSS Base Scores

version 3.1