Severity:

HIGH RISK

(7.5)

Improper Output Encoding (CWE-116) in Apache Log4j XmlLayout Producing Invalid XML Logs

CVE-2026-34480

Published:

Apr 10, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Vulnerability Type

Vulnerability Type

Category:

Improper Output Encoding

CWE:

CWE-116

Impact:

Log Integrity and Availability Loss

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Output Encoding

CWE:

CWE-116

Impact:

Log Integrity and Availability Loss

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.