Answer in brief
CVE-2026-43515 records a Critical severity (CVSS 9.1) vulnerability in Apache Tomcat - Security constraints not correctly applied. The current sources do not mark it as known exploited. The current feed maps org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat:tomcat (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat:tomcat (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=0 <9.0.118 | 9.0.118 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=10.1.0-M1 <10.1.55 | 10.1.55 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=11.0.0-M1 <11.0.22 | 11.0.22 |
| org.apache.tomcat:tomcatmaven | >=0 <9.0.118 | 9.0.118 |
| org.apache.tomcat:tomcatmaven | >=10.1.0-M1 <10.1.55 | 10.1.55 |
| org.apache.tomcat:tomcatmaven | >=11.0.0-M1 <11.0.22 | 11.0.22 |
| org.apache.tomcat:tomcat-catalinamaven | >=0 <9.0.118 | 9.0.118 |
| org.apache.tomcat:tomcat-catalinamaven | >=10.1.0-M1 <10.1.55 | 10.1.55 |
| org.apache.tomcat:tomcat-catalinamaven | >=11.0.0-M1 <11.0.22 | 11.0.22 |
Published upstream
May 12, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.0.M1 to 9.0.117 Older, unsupported versions may also be affected Description: When multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. Mitigation: Users of the affected versions should apply one of the following mitigations: - Upgrade to Apache Tomcat 11.0.22 or later - Upgrade to Apache Tomcat 10.1.55 or later - Upgrade to Apache Tomcat 9.0.118 or later
Quoted source text, attributed separately from HOL analysis.