CVE-2026-87022

Description

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. 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 EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 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 9.1.22, which fix the issue.

Overview

State: PUBLISHED
Assigner (CNA): apache
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: 7.5 / 10 HIGH source: NVD
CWE(s): CWE-130
Reserved: 2026-09-08
Published: 2026-09-23 11:32 UTC
Last updated: 2026-09-23 18:10 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/87xxx/CVE-2026-87022.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 12:17:08 UTC
NVD last modified: 2026-09-23 19:19:42 UTC
NVD CVSS v3.1: 7.5 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Exploitability subscore: 3.9 / 10
Impact subscore: 3.6 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85236
Assigner: apache
Published: Sep 23, 2026, 11:32:55 AM
Updated: Sep 23, 2026, 6:10:52 PM
EUVD base score (CVSS 3.1): 7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EUVD-reported EPSS: 0.0000
Vendors: Apache Software Foundation
Products: Apache Tomcat (9.0.0.M1 ≤9.0.121)

Apache Tomcat (8.5.0 ≤8.5.100)

Apache Tomcat (7.0.56 ≤7.0.109)

Apache Tomcat (10.1.0-M1 ≤10.1.59)

Apache Tomcat (11.0.0-M1 ≤11.0.25)
Aliases: GHSA-xwrc-v28h-528j

ENISA description: Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. 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 EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 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 9.1.22, which fix the issue.

EUVD references (1)

https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w

Affected products (1)

Vendor	Product	Versions	Platforms
Apache Software Foundation	Apache Tomcat	`11.0.0-M1` (affected), `10.1.0-M1` (affected), `9.0.0.M1` (affected), `8.5.0` (affected), `7.0.56` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w vendor-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

http://www.openwall.com/lists/oss-security/2026/09/23/30 af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w security@apache.org

Remediations (10)

The Fix (2026 film) - Wikipedia

web:en.wikipedia.org

The Fix is a 2026 American action film directed by Guy Moshe and starring Liam Neeson, Zachary Levi, and Elnaaz Norouzi. The Fix was released in the United States on September 11, 2026 .

2026-09-24 11:48 UTC
Fix it up Wiki | Fandom

web:fix-it-up.fandom.com

Home Welcome to the Official Fix It Up Wiki! This community wiki is dedicated to helping both new and experienced mechanics in the Roblox game Fix It Up!. Here you will find information about repairing cars, upgrading tools, customizing vehicles, and mastering the game.

2026-09-24 11:48 UTC
Online-Fix - Community Multiplayer Restoration for PC Games

web:online-fix.xyz

Online- Fix is a community platform that restores multiplayer and co-op features in PC games using shared fixes and networking solutions after servers shut down.

2026-09-24 11:48 UTC
Patch - Everything Local: Breaking News, Events, Discussions

web:patch.com

The best breaking news, stories, and events from the Patch network of local news sites

2026-09-24 11:48 UTC
Tuscaloosa News, Breaking News in Tuscaloosa, AL - Patch

web:patch.com

Tuscaloosa Latest Headlines: U.S. Marshals Task Force Officer Shot, Murder Suspect Killed In Marengo County; City Of Tuscaloosa Honors More Than 90 Employees At Excellence Awards; 6 Money Hacks ...

2026-09-24 11:48 UTC
Patch - Facebook

web:www.facebook.com

Patch . 127,051 followers · 163 talking about this. Patch's official Facebook page, sharing stories from our network of local news sites.

2026-09-24 11:48 UTC
Fix.com | Your Source for Genuine Parts & DIY Repair Help

web:www.fix.com

Fix .com is a one-stop source for fixing products in and around your home. Millions of quality OEM replacement parts, repair videos, instructions, and same-day shipping available!

2026-09-24 11:48 UTC
Patch Instructions - Kagura Games

web:www.kaguragames.com

3. Click "Next" 2 more times. After the patch is finished installing, your game should now be patched.

2026-09-24 11:48 UTC
P.A.T.C.H. Career Institute - New Home

web:www.patchcareerinstitute.com

CONTACT PATCH . TRAINING MAY BE MORE AFFORDABLE THAN YOU THINK. Funding and tuition assistance opportunities may be available for eligible students. READY TO GET PATCHED?

2026-09-24 11:48 UTC
Patch | Environmental market AI-native services

web:www.patch.io

Patch is the AI-native services company for environmental markets. One platform for carbon, RECs, and SAFc — embedded experts, proprietary data, built-in AI.

2026-09-24 11:48 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-87022.json.

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