CVE-2026-9828 (Medium) detected in logback-core-1.5.32.jar

[mend-bolt-for-github]

CVE-2026-9828 - Medium Severity Vulnerability

Vulnerable Library - logback-core-1.5.32.jar

logback-core module

Library home page: http://logback.qos.ch

Path to dependency file: /pom.xml

Path to vulnerable library: /home/wss-scanner/.m2/repository/ch/qos/logback/logback-core/1.5.32/logback-core-1.5.32.jar

Dependency Hierarchy:

• logback-classic-1.5.32.jar (Root Library)
  • ❌ logback-core-1.5.32.jar (Vulnerable Library)

Found in base branch: master

Vulnerability Details

Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.
More precisely, an attacker able to influence serialized data sent to
SimpleSocketServer or SimpleSSLSocketServer can instantiate objects from
classes in the java.lang and java.util packages that are not explicitly
blocked.
Although deserialization is heavily restricted by HardenedObjectInputStream and no
practical way to achieve remote code execution or significant privilege
escalation has been identified, this issue constitutes a bypass of the
intended security restrictions.
This issue affects logback: through 1.5.32 inclusive.

Publish Date: 2026-05-28

URL: CVE-2026-9828

CVSS 3 Score Details (5.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://logback.qos.ch/news.html#⁠1.5.33

Release Date: 2026-05-28

Fix Resolution (ch.qos.logback:logback-core): 1.5.33

Direct dependency fix Resolution (ch.qos.logback:logback-classic): 1.5.33

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