CVE-2026-33701
A vulnerability in OpenTelemetry Java Instrumentation allows for unsafe data processing during RMI (Remote Method Invocation) operations. If certain conditions are met, an attacker can send malicious data that the system processes insecurely, potentially leading to unauthorized command execution.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Users running OpenTelemetry Java Instrumentation (versions prior to 2.26.1) on JDK 16 or earlier, where JMX/RMI ports are network-reachable and a compatible library is present on the classpath.
Real-world impact
An attacker with network access to a configured JMX or RMI port could execute arbitrary code on the server, running with the same permissions as the user running the Java application.
Why this severity
The critical score reflects that the vulnerability can be exploited remotely over a network without requiring user interaction or special privileges, potentially leading to full system compromise.
What to do about it
- 01If using JDK 16 or earlier, upgrade OpenTelemetry Java Instrumentation to version 2.26.1 or later.
- 02If using JDK 17 or later, upgrade to version 2.26.1 or later as a best practice.
- ›Set the system property -Dotel.instrumentation.rmi.enabled=false to disable RMI integration.
NVD-referenced vendor advisory
Timeline
- Mar 27, 2026 · Mar 27, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Aug 4, 2026 · 22h agoAdvisory updatedThe NVD record was last revised.
- Aug 4, 2026 · 20h agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.