CVE-2026-34483

Published: Apr 09, 2026 Last Modified: Apr 14, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116.

Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0003
Percentile
0,1th
Updated

EPSS Score Trend (Last 7 Days)

116

Improper Encoding or Escaping of Output

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability Access Control
Potential Impacts:
Modify Application Data Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Technologies: AI/ML, Database Server, Not Technology-Specific, Web Server
Likelihood of Exploit: High
View CWE Details
Application

Tomcat by Apache

Product Information
Vendor Apache
Product Tomcat
Version Range Affected
From 9.0.40 (inclusive)
To 9.0.117 (exclusive)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Tomcat by Apache

Product Information
Vendor Apache
Product Tomcat
Version Range Affected
From 11.0.0 (inclusive)
To 11.0.21 (exclusive)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Tomcat by Apache

Product Information
Vendor Apache
Product Tomcat
Version Range Affected
From 10.1.0 (inclusive)
To 10.1.54 (exclusive)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
http://www.openwall.com/lists/oss-security/2026/04/09/26
http://www.openwall.com/lists/oss-security/2026/04/09/26
https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1…
https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b