| Name | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6120-1, DSA-6121-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| tomcat10 (PTS) | bookworm | 10.1.34-0+deb12u2 | vulnerable |
| bookworm (security) | 10.1.52-1~deb12u1 | fixed | |
| trixie | 10.1.40-1 | vulnerable | |
| trixie (security) | 10.1.52-1~deb13u1 | fixed | |
| forky, sid | 10.1.52-1 | fixed | |
| tomcat11 (PTS) | trixie | 11.0.6-1 | vulnerable |
| trixie (security) | 11.0.15-1~deb13u1 | fixed | |
| forky, sid | 11.0.18-1 | fixed | |
| tomcat9 (PTS) | bullseye | 9.0.43-2~deb11u10 | vulnerable |
| bullseye (security) | 9.0.107-0+deb11u2 | fixed | |
| bookworm | 9.0.70-2 | fixed | |
| trixie | 9.0.95-1 | fixed | |
| forky, sid | 9.0.115-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| tomcat10 | source | bookworm | 10.1.52-1~deb12u1 | DSA-6120-1 | ||
| tomcat10 | source | trixie | 10.1.52-1~deb13u1 | DSA-6120-1 | ||
| tomcat10 | source | (unstable) | 10.1.52-1 | |||
| tomcat11 | source | trixie | 11.0.15-1~deb13u1 | DSA-6121-1 | ||
| tomcat11 | source | (unstable) | 11.0.15-1 | |||
| tomcat9 | source | (unstable) | 9.0.70-2 |
Starting with 9.0.70-2 src:tomcat9 no longer ships the server stack, using that as the fixed version
https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
Fixed by: https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b (11.0.15)
Fixed by: https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4 (10.1.50)
Fixed by: https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f (9.0.113)