{"id":"GHSA-h8w2-rv57-vc6f","summary":"splunk-otel-javaagent: Unsafe deserialization in RMI instrumentation may lead to Remote Code Execution","details":"In versions prior to 2.26.1, the RMI instrumentation registered a custom endpoint that deserialized incoming data without applying serialization filters. An attacker with network access to a JMX or RMI port on an instrumented JVM could exploit this to potentially achieve remote code execution. All three of the following conditions must be true to exploit this vulnerability:\n1. Splunk Distribution of OpenTelemetry Java is attached as a Java agent (`-javaagent`)\n2. An RMI endpoint is network-reachable (e.g. JMX remote port, an RMI registry, or any application-exported RMI service)\n3. A gadget-chain-compatible library is present on the classpath\n\n### Impact\nArbitrary remote code execution with the privileges of the user running the instrumented JVM.\n\n### Recommendation\nUpgrade to version 2.26.1 or later.\n\n### Workarounds\nSet the following system property to disable the RMI integration:\n\n```\n-Dotel.instrumentation.rmi.enabled=false\n```\n\n### References\n[Advisory in OpenTelemetry Instrumentation for Java](https://github.com/open-telemetry/opentelemetry-java-instrumentation/security/advisories/GHSA-xw7x-h9fj-p2c7)","modified":"2026-03-26T17:33:06.844664Z","published":"2026-03-26T17:22:53Z","database_specific":{"cwe_ids":["CWE-1395","CWE-502"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-03-26T17:22:53Z","nvd_published_at":null},"references":[{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-java-instrumentation/security/advisories/GHSA-xw7x-h9fj-p2c7"},{"type":"WEB","url":"https://github.com/signalfx/splunk-otel-java/security/advisories/GHSA-h8w2-rv57-vc6f"},{"type":"PACKAGE","url":"https://github.com/signalfx/splunk-otel-java"}],"affected":[{"package":{"name":"com.splunk:splunk-otel-javaagent","ecosystem":"Maven","purl":"pkg:maven/com.splunk/splunk-otel-javaagent"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.26.1"}]}],"versions":["1.10.0","1.10.1","1.10.2","1.11.0","1.12.0","1.13.0","1.13.1","1.14.0","1.14.1","1.14.2","1.15.0","1.16.0","1.17.0","1.18.0","1.19.0","1.2.0","1.20.0","1.21.0","1.22.0","1.23.0","1.23.1","1.24.0","1.24.1","1.25.0","1.26.0","1.27.0","1.28.0","1.29.0","1.29.1","1.3.0","1.3.1","1.30.0","1.30.1","1.30.2","1.30.3","1.31.0","1.31.1","1.32.0","1.32.1","1.32.2","1.32.3","1.32.4","1.32.5","1.4.0","1.5.0","1.6.0","1.6.1","1.7.0","1.7.1","1.7.2","1.7.3","1.8.0","1.8.1","1.8.2","1.9.0","1.9.1","2.0.0-alpha","2.1.0-alpha","2.10.0","2.11.0","2.12.0","2.13.0","2.13.1","2.14.0","2.15.0","2.16.0","2.17.0","2.17.1","2.18.0","2.19.0","2.2.0-alpha","2.20.0","2.20.1","2.21.0","2.21.1","2.22.0","2.23.0","2.24.0","2.25.0","2.25.1","2.26.0","2.3.0-alpha","2.4.0-alpha","2.5.0","2.6.0","2.7.0","2.8.0","2.8.1","2.9.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-h8w2-rv57-vc6f/GHSA-h8w2-rv57-vc6f.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}