---
cve: "CVE-2026-33701"
severity: "CRITICAL"
cvss: 9.3
epss: "93%"
vendor: "open-telemetry"
kev: false
exploited: false
published: "2026-03-27 01:16:19"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T23:38:45+02:00"
---

# CVE-2026-33701

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

OpenTelemetry Java Instrumentation provides OpenTelemetry auto-instrumentation and instrumentation libraries for Java. In versions prior to 2.26.1, the RMI instrumentation registered a custom endpoint that deserialized incoming data without applying serialization filters. On JDK version 16 and earlier, 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: First, OpenTelemetry Java instrumentation is attached as a Java agent (`-javaagent`) on Java 16 or earlier. Second, JMX/RMI port has been explicitly configured via `-Dcom.sun.management.jmxremote.port` and is network-reachable. Third, gadget-chain-compatible library is present on the classpath. This results in arbitrary remote code execution with the privileges of the user running the instrumented JVM. For JDK >= 17, no action is required, but upgrading is strongly encouraged. For JDK < 17, upgrade to version 2.26.1 or later. As a workaround, set the system property `-Dotel.instrumentation.rmi.enabled=false` to disable the RMI integration.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 9cf4fbaaa9e79226142b2ed42a6f6b4ac0be2197 (Commit)

## Referenzen

- <https://github.com/open-telemetry/opentelemetry-java-instrumentation/security/advisories/GHSA-xw7x-h9fj-p2c7>
- <https://github.com/open-telemetry/opentelemetry-java-instrumentation/commit/9cf4fbaaa9e79226142b2ed42a6f6b4ac0be2197>
- <https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/tag/v2.26.1>
- <https://access.redhat.com/security/cve/CVE-2026-33701>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2452071>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33701.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33701) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_