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CVE-2026-34483— Apache Tomcat: Incomplete escaping of JSON access logs

EPSS 0.08% · P24
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I. Basic Information for CVE-2026-34483

Vulnerability Information
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Vulnerability Title
Apache Tomcat: Incomplete escaping of JSON access logs
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对输出编码和转义不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Tomcat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 11.0.0-M1至11.0.20版本、10.1.0-M1至10.1.53版本和9.0.40至9.0.116版本存在安全漏洞，该漏洞源于JsonAccessLogValve组件输出编码或转义不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache Tomcat 11.0.0-M1 ~ 11.0.20 -

II. Public POCs for CVE-2026-34483

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III. Intelligence Information for CVE-2026-34483

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Same Patch Batch · Apache Software Foundation · 2026-04-09 · 17 CVEs total

CVE-2026-34500Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
CVE-2026-34487Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer tok
CVE-2026-34486Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
CVE-2026-32990Apache Tomcat: Fix for CVE-2025-66614 is incomplete
CVE-2026-29146Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default
CVE-2026-29145Apache Tomcat, Apache Tomcat Native: OCSP checks sometimes soft-fail even when soft-fail i
CVE-2026-29129Apache Tomcat: TLS cipher order is not preserved
CVE-2026-25854Apache Tomcat: Occasionally open redirect
CVE-2026-24880Apache Tomcat: Request smuggling via invalid chunk extension
CVE-2026-40046Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168
CVE-2026-33005Apache OpenMeetings: Insufficient checks in FileWebService
CVE-2026-33266Apache OpenMeetings: Hardcoded Remember-Me Cookie Encryption Key and Salt
CVE-2026-34020Apache OpenMeetings: Login Credentials Passed via GET Query Parameters
CVE-2025-57735Apache Airflow: Airflow Logout Not Invalidating JWT
CVE-2025-62188Apache DolphinScheduler: Users can access sensitive information through the actuator endpo
CVE-2026-34538Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: Apache Software Foundation
Same weakness: CWE-116

V. Comments for CVE-2026-34483

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