CVE-2021-41766

Insecure Java Deserialization in Apache Karaf

HIGH
8.1
CVSS Score
Published: January 26, 2022 at 11:10 AM UTC
Updated: June 17, 2026 at 04:08 AM UTC
1 product affected across 1 vendorKaraf

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Severity
HIGH8.1
Exploit prediction
EPSS 2%

Description

Apache Karaf allows monitoring of applications and the Java runtime by using the Java Management Extensions (JMX). JMX is a Java RMI based technology that relies on Java serialized objects for client server communication. Whereas the default JMX implementation is hardened against unauthenticated deserialization attacks, the implementation used by Apache Karaf is not protected against this kind of attack. The impact of Java deserialization vulnerabilities strongly depends on the classes that are available within the targets class path. Generally speaking, deserialization of untrusted data does always represent a high security risk and should be prevented. The risk is low as, by default, Karaf uses a limited set of classes in the JMX server class path. It depends of system scoped classes (e.g. jar in the lib folder).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.3.6Apache Karaf ≤ v < 4.3.6
Affected range stops below 4.3.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-502

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