---
id: CVE-2026-88041
title: 'Apache Tomcat: HTTP/2 trailer header cross-contamination'
summary: >-
  Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer
  information from a previous request to leak into a subsequent request.




  This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from
  10.1.27 through 10.1.6…
severity: none
cwe:
  - CWE-459
vendor: Apache Software Foundation
product: Apache Tomcat
affected:
  - apache_tomcat >= 11.0.0-M23 <= 11.0.26
  - apache_tomcat >= 10.1.27 <= 10.1.60
  - apache_tomcat >= 9.0.92 <= 9.0.122
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T13:43:28.681Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-88041'
references:
  - url: 'https://lists.apache.org/thread.html/dnmm9l3byytg3l66nk1jrqfrl7jty7n1'
tags:
  - cve.org
ingestedAt: '2026-10-20T14:08:00.571Z'
---

## Overview

Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.



This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122.



Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

## Affected

- `apache_tomcat >= 11.0.0-M23 <= 11.0.26`
- `apache_tomcat >= 10.1.27 <= 10.1.60`
- `apache_tomcat >= 9.0.92 <= 9.0.122`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.