| Name | CVE-2026-78383 |
| Description | Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix 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) |
| Debian Bugs | 1148824 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| tomcat10 (PTS) | bookworm, bookworm (security) | 10.1.55-1~deb12u1 | vulnerable |
| trixie (security), trixie | 10.1.55-1~deb13u1 | vulnerable | |
| forky, sid | 10.1.60-1 | fixed | |
| tomcat11 (PTS) | trixie (security), trixie | 11.0.22-1~deb13u1 | vulnerable |
| forky, sid | 11.0.24-1 | vulnerable | |
| tomcat9 (PTS) | bookworm | 9.0.70-2 | fixed |
| trixie | 9.0.95-1 | fixed | |
| forky, sid | 9.0.122-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| tomcat10 | source | (unstable) | 10.1.60-1 | |||
| tomcat11 | source | (unstable) | (unfixed) | 1148824 | ||
| 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://github.com/apache/tomcat/commit/6dabd4303095785183ede57f6d162c542955a5a8 (11.0.26)
https://github.com/apache/tomcat/commit/2ed6d18ebfe4b085ef050dd0a0f4f20aff3bc48d (10.1.60)
https://github.com/apache/tomcat/commit/265bdc0a58b1447ff5d8f8b96ea81de58cb74c8c (9.0.122)