CVE-2026-43515

Publication date 12 May 2026

Last updated 16 July 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.1 · Critical

Score breakdown

Description

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Read the notes from the security team

Status

Package Ubuntu Release Status
tomcat6 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty
Fixed in 6.0.39-1ubuntu0.1+esm3
tomcat7 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 7.0.68-1ubuntu0.4+esm4
14.04 LTS trusty
Fixed in 7.0.52-1ubuntu0.16+esm2
tomcat8 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed in 8.5.39-1ubuntu1~18.04.3+esm6
16.04 LTS xenial
Fixed in 8.0.32-1ubuntu1.13+esm2
tomcat9 26.10 stonking
Not affected
26.04 LTS resolute
Fixed in 9.0.115-1ubuntu0.1
25.10 questing
Fixed in 9.0.95-1ubuntu1.1
24.04 LTS noble
Fixed in 9.0.70-2ubuntu0.1+esm3
22.04 LTS jammy
Fixed in 9.0.58-1ubuntu0.2+esm4
20.04 LTS focal
Fixed in 9.0.31-1ubuntu0.9+esm3
18.04 LTS bionic
Fixed in 9.0.16-3ubuntu0.18.04.2+esm8
tomcat10 26.10 stonking
Not affected
26.04 LTS resolute
Fixed in 10.1.40-1ubuntu1.26.04.1
25.10 questing
Fixed in 10.1.40-1ubuntu1.25.10.1
24.04 LTS noble
Fixed in 10.1.16-1ubuntu0.1~esm4
22.04 LTS jammy Not in release
tomcat11 26.10 stonking
Not affected
26.04 LTS resolute
Fixed in 11.0.18-1ubuntu0.1~esm1
25.10 questing Ignored end of life, was needed
24.04 LTS noble Not in release
22.04 LTS jammy Not in release

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Notes

ebarretto

xenial tomcat6 only builds libservlet2.5-java, not the Tomcat server binaries bionic tomcat7 only builds libservlet3.0-java, not the Tomcat server binaries

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
tomcat6
tomcat7
tomcat11

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.1 · Critical

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references

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