CVE-2026-54712Network attack vector

Service interruption via oversized RMI context strings

Published Jul 1, 2026 · Updated Jul 1, 2026

Uncontrolled resource consumption in OpenTelemetry Instrumentation for Java before 2.27.0 allows remote attackers to interrupt service via RMI. The ContextPayload.read method calls ObjectInput.readUTF for every key and value while enforcing only an entry-count limit, so aggregate string size drives excessive JVM memory allocation. Reachability requires the Java agent with RMI instrumentation enabled and a network-reachable RMI endpoint; OpenTelemetry does not state whether the interruption is a slowdown, hang, or crash.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in OpenTelemetry Instrumentation for Java before 2.27.0 allows remote attackers to interrupt service via RMI. The ContextPayload.read method calls ObjectInput.readUTF for every key and value while enforcing only an entry-count limit, so aggregate string size drives excessive JVM memory allocation. Reachability requires the Java agent with RMI instrumentation enabled and a network-reachable RMI endpoint; OpenTelemetry does not state whether the interruption is a slowdown, hang, or crash.

The record

CVE
CVE-2026-54712
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
OpenTelemetry
Product
OpenTelemetry Instrumentation for Java
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.27.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenTelemetry · OpenTelemetry Instrumentation for Javaversion=< 2.27.0

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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