CVE-2026-24733
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 10.1.52-1~deb13u1 |
| sid | Fixed | 10.1.52-1 |
| forky | Fixed | 10.1.52-1 |
| bullseye | Fixed | 9.0.70-2 |
| bookworm | Fixed | 10.1.52-1~deb12u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >=11.0.0-M1,<11.0.15 | 11.0.15 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >=10.1.0-M1,<10.1.50 | 10.1.50 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | <9.0.113 | 9.0.113 |
| Maven | org.apache.tomcat:tomcat | >=11.0.0-M1,<11.0.15 | 11.0.15 |
| Maven | org.apache.tomcat:tomcat | >=10.1.0-M1,<10.1.50 | 10.1.50 |
| Maven | org.apache.tomcat:tomcat | <9.0.113 | 9.0.113 |
| Maven | org.apache.tomcat:tomcat-catalina | >=11.0.0-M1,<11.0.15 | 11.0.15 |
| Maven | org.apache.tomcat:tomcat-catalina | >=10.1.0-M1,<10.1.50 | 10.1.50 |
| Maven | org.apache.tomcat:tomcat-catalina | <9.0.113 | 9.0.113 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-24733
- https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
- https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
- https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- https://www.suse.com/security/cve/CVE-2026-24733.html
- https://security-tracker.debian.org/tracker/CVE-2026-24733
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.