{"cve":"CVE-2021-41766","nvd":{"published":"2022-01-26T11:15:08.433","modified":"2026-06-17T04:08:53.120","status":"Modified","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).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-502"],"references":["https://karaf.apache.org/security/cve-2021-41766.txt","https://karaf.apache.org/security/cve-2021-41766.txt"],"products":["apache:karaf"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2021-41766","score":0.02033,"percentile":0.81072,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jh5g-9m4v-9vv9","url":"https://osv.dev/vulnerability/GHSA-jh5g-9m4v-9vv9","summary":"Insecure Java Deserialization in Apache Karaf","modified":"2024-02-16T08:13:23.445279Z","packages":[{"ecosystem":"Maven","name":"org.apache.karaf.management:org.apache.karaf.management.server","purl":"pkg:maven/org.apache.karaf.management/org.apache.karaf.management.server","ranges":["<4.3.6"],"fixed":["4.3.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}