PT-2026-30534 · Maven · Com.Splunk:Splunk-Otel-Javaagent

Published 2026-03-26 · Updated 2026-03-26

OSV

CVSS v4.0

9.3

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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:

1. Splunk Distribution of OpenTelemetry Java is attached as a Java agent (-javaagent)
2. An RMI endpoint is network-reachable (e.g. JMX remote port, an RMI registry, or any application-exported RMI service)
3. A gadget-chain-compatible library is present on the classpath

Impact

Arbitrary remote code execution with the privileges of the user running the instrumented JVM.

Recommendation

Upgrade to version 2.26.1 or later.

Workarounds

Set the following system property to disable the RMI integration:

-Dotel.instrumentation.rmi.enabled=false

References

Advisory in OpenTelemetry Instrumentation for Java

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-1395

CWE-502

Related Identifiers

GHSA-H8W2-RV57-VC6F

Affected Products

Com.Splunk:Splunk-Otel-Javaagent

References · 4

• https://osv.dev/vulnerability/GHSA-h8w2-rv57-vc6f · Vendor Advisory
• https://github.com/open-telemetry/opentelemetry-java-instrumentation/security/advisories/GHSA-xw7x-h9fj-p2c7 · Note
• https://github.com/signalfx/splunk-otel-java/security/advisories/GHSA-h8w2-rv57-vc6f · Note
• https://github.com/signalfx/splunk-otel-java · Note