CVE-2026-44902Public exploitNetwork attack vector

Process crash via uncaught malformed-URL exception

Published May 27, 2026 · Updated May 27, 2026

Denial of service in OpenTelemetry JavaScript before 0.217.0 allows remote attackers to crash Node.js processes via malformed HTTP requests. PrometheusExporter._requestHandler passes request.url to the URL constructor without catching TypeError, so an absolute-form http:// URI terminates the process. Exploitation requires network access to an application using the exporter's built-in server, which listens on 0.0.0.0:9464 by default.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in OpenTelemetry JavaScript before 0.217.0 allows remote attackers to crash Node.js processes via malformed HTTP requests. PrometheusExporter._requestHandler passes request.url to the URL constructor without catching TypeError, so an absolute-form http:// URI terminates the process. Exploitation requires network access to an application using the exporter's built-in server, which listens on 0.0.0.0:9464 by default.

The record

CVE
CVE-2026-44902
Published
May 27, 2026
Updated
May 27, 2026
Vendor
OpenTelemetry
Product
@opentelemetry/sdk-node
Classifications
CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=< 0.217.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenTelemetry · @opentelemetry/sdk-nodeversion=< 0.217.0
OpenTelemetry · @opentelemetry/auto-instrumentations-nodeversion=< 0.75.0
OpenTelemetry · OpenTelemetry JavaScriptversion=< 0.217.0
OpenTelemetry · @opentelemetry/exporter-prometheusversion=< 0.217.0

Published CVSS scores

7.5GitHubCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499.004Application or System Exploitation

Public exploit references

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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