Answer in brief
CVE-2026-24733 records a Low severity vulnerability in Apache Tomcat - Security constraint bypass with HTTP/0.9. The current sources do not mark it as known exploited. The current feed maps org.apache.tomcat:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (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.
A CVSS score is not reported in the current record. 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:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (maven), org.apache.tomcat:tomcat-coyote (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.apache.tomcat:tomcat-coyotemaven | >=11.0.0-M1,<11.0.15 | 11.0.15 |
| org.apache.tomcat:tomcat-coyotemaven | >=10.1.0-M1,<10.1.50 | 10.1.50 |
| org.apache.tomcat:tomcat-coyotemaven | <9.0.113 | 9.0.113 |
| org.apache.tomcat:tomcat-coyotemaven | >=11.0.0-M1 <11.0.15 | 11.0.15 |
| org.apache.tomcat:tomcat-coyotemaven | >=10.1.0-M1 <10.1.50 | 10.1.50 |
| org.apache.tomcat:tomcat-coyotemaven | >=0 <9.0.113 | 9.0.113 |
Published upstream
Feb 17, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 11, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Jun 29, 2026
Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
Quoted source text, attributed separately from HOL analysis.