CVE-2026-13006
Incomplete protection against CVE-2025-11226
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. 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. Please note that in logack version 1.5.37 conditional processing using Janino was removed.
INFO
Published Date :
June 24, 2026, 7:16 a.m.
Last Modified :
July 1, 2026, 12:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | 455daabc-a392-441d-aa46-37d35189897c | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update logback-core library to a patched version.
- Review and sanitize logback configuration files.
- Limit write access to configuration files.
- Avoid injecting malicious environment variables.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-13006.
| URL | Resource |
|---|---|
| https://logback.qos.ch/news.html#1.5.37 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-13006 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-13006
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-13006 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-13006 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 01, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'QOS.CH Sarl', 'modules': ['logback-core'], 'product': 'Logback-core', 'versions': [{'status': 'affected', 'version': '0.9.20', 'versionType': 'maven', 'lessThanOrEqual': '1.5.35'}, {'status': 'unaffected', 'version': '1.5.36', 'versionType': 'maven'}], 'platforms': ['Java'], 'defaultStatus': 'unaffected'}] [{'vendor': 'QOS.CH Sarl', 'modules': ['logback-core'], 'product': 'Logback-core', 'versions': [{'status': 'affected', 'version': '0.9.20', 'versionType': 'maven', 'lessThanOrEqual': '1.5.36'}, {'status': 'unaffected', 'version': '1.5.37', 'versionType': 'maven'}], 'platforms': ['Java'], 'defaultStatus': 'unaffected'}] Changed 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. 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. 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. Please note that in logack version 1.5.37 conditional processing using Janino was removed. Added Reference https://logback.qos.ch/news.html#1.5.37 Removed Reference https://logback.qos.ch/news.html#1.5.36 -
CVE Modified by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'QOS.CH Sarl', 'modules': ['logback-core'], 'product': 'Logback-core', 'versions': [{'status': 'affected', 'version': '0.9.20', 'versionType': 'maven', 'lessThanOrEqual': '1.5.134'}, {'status': 'unaffected', 'version': '1.5.35', 'versionType': 'maven'}], 'platforms': ['Java'], 'defaultStatus': 'unaffected'}] [{'vendor': 'QOS.CH Sarl', 'modules': ['logback-core'], 'product': 'Logback-core', 'versions': [{'status': 'affected', 'version': '0.9.20', 'versionType': 'maven', 'lessThanOrEqual': '1.5.35'}, {'status': 'unaffected', 'version': '1.5.36', 'versionType': 'maven'}], 'platforms': ['Java'], 'defaultStatus': 'unaffected'}] Changed 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. Added Reference https://logback.qos.ch/news.html#1.5.36 Removed Reference https://logback.qos.ch/news.html#1.5.35 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 24, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-13006', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T12:24:18.335394Z'} -
New CVE Received by [email protected]
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'QOS.CH Sarl', 'modules': ['logback-core'], 'product': 'Logback-core', 'versions': [{'status': 'affected', 'version': '0.9.20', 'versionType': 'maven', 'lessThanOrEqual': '1.5.134'}, {'status': 'unaffected', 'version': '1.5.35', 'versionType': 'maven'}], 'platforms': ['Java'], 'defaultStatus': 'unaffected'}] 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. Added CVSS V4.0 AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:X/V:X/RE:M/U:Green Added CWE CWE-20 Added Reference https://logback.qos.ch/news.html#1.5.35