CVE-2026-13006
Severity CVSS v4.0:
HIGH
Type:
CWE-20
Input Validation
Publication date:
24/06/2026
Last modified:
01/07/2026
Description
ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.36 in Java applications, allows an attacker to execute arbitrary code circumventing existing protections against CVE-2025-11226 by compromising an existing logback configuration file or by injecting an environment variable before program execution.<br />
<br />
<br />
<br />
A successful attack requires the presence of Janino library to be present on the user&#39;s class path. In addition, the attacker must have write access to a <br />
configuration file. Alternatively, the attacker could inject a malicious <br />
environment variable pointing to a malicious configuration file. In both <br />
cases, the attack requires existing privilege.<br />
<br />
Please note that in logack version 1.5.37 conditional processing using Janino was removed.