Description
ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.35 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.



A successful attack requires the presence of Janino library to be present on the user's class path. In addition, 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 privilege.
Published: 2026-06-24
Score: 7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Remove Janino from the Java classpath or update to logack version 1.5.36 or later. As of logback 1.5.20, the <condition> element with a custom PropertyEvaluator offers a recommended alternative to conditionals requiring Janino.


Vendor Workaround

Remove Janino from the Java classpath or update to logack version 1.5.36 or later. As of logback 1.5.20, the <condition> element with a custom PropertyEvaluator offers a recommended alternative to conditionals requiring Janino.

Tracking

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Advisories

No advisories yet.

History

Fri, 26 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Description ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.34 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. A successful attack requires the presence of Janino library to be present on the user's class path. In addition, 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 privilege. ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.35 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. A successful attack requires the presence of Janino library to be present on the user's class path. In addition, 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 privilege.
References

Fri, 26 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-94
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}

threat_severity

Moderate


Wed, 24 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Qos.ch Sarl
Qos.ch Sarl logback-core
Vendors & Products Qos.ch Sarl
Qos.ch Sarl logback-core

Wed, 24 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 24 Jun 2026 06:30:00 +0000

Type Values Removed Values Added
Description ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.34 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. A successful attack requires the presence of Janino library to be present on the user's class path. In addition, 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 privilege.
Title Incomplete protection against CVE-2025-11226
Weaknesses CWE-20
References
Metrics cvssV4_0

{'score': 7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/S:P/AU:N/RE:M/U:Green'}


Subscriptions

Qos.ch Sarl Logback-core
cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-06-26T12:54:43.411Z

Reserved: 2026-06-23T14:31:36.004Z

Link: CVE-2026-13006

cve-icon Vulnrichment

Updated: 2026-06-24T12:24:24.228Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-24T05:41:32Z

Links: CVE-2026-13006 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-26T15:15:02Z

Weaknesses