CVE-2025-11226

Description

QOS.CH logback-core versions up to 1.5.18 contain an ACE vulnerability in conditional configuration file processing in Java applications. This vulnerability allows an attacker to execute arbitrary code by compromising an existing logback configuration file or by injecting a malicious environment variable before program execution. A successful attack requires the Janino library and Spring Framework to be present on the user's class path. Additionally, the attacker must have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privileges.

How to fix CVE-2025-11226

To remediate CVE-2025-11226, upgrade the affected package to a fixed version below.

• —upgrade to 1.5.19 or later

Is CVE-2025-11226 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• >= 1.4.0, < 1.5.19

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-11226
• PATCHgithub.com/qos-ch/logback
• WEBgithub.com/qos-ch/logback/commit/61f6a2544f36b3016e0efd434ee21f19269f1df7
• WEBgithub.com/qos-ch/logback/issues/974
• WEB