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CVE-2026-59892— OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header

Quick assessment

Affected
open-telemetry opentelemetry-js
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenTelemetry OpenTelemetry JavaScript Client是OpenTelemetry基金会的一组JavaScript客户端工具库软件。 OpenTelemetry JavaScript Client 2.9.0之前版本存在异常处理不当漏洞，该漏洞源于@opentelemetry/propagator-jaeger使用decodeURIComponent()解码入站HTTP标头值时不处理解码错误，可能导致未经身份验证的远程攻击者发送畸形的百分号编码值，抛出未捕获的URIEr

CVSS 7.5 · High EPSS 0.78% · P54

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-telemetry opentelemetry-js < 2.9.0 affected
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I. Basic Information for CVE-2026-59892

Vulnerability Information
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Vulnerability Title
OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header
Source: CVE Program / CVE List V5
Vulnerability Description
OpenTelemetry JavaScript is the OpenTelemetry JavaScript client. Prior to 2.9.0, @opentelemetry/propagator-jaeger decodes incoming uber-trace-id and uberctx-* HTTP header values with decodeURIComponent() without handling decode errors, allowing an unauthenticated remote attacker to send a malformed percent-encoded value that throws an uncaught URIError and terminates a Node.js process using JaegerPropagator as the active propagator. This issue is fixed in version 2.9.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry JavaScript Client 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry OpenTelemetry JavaScript Client是OpenTelemetry基金会的一组JavaScript客户端工具库软件。 OpenTelemetry JavaScript Client 2.9.0之前版本存在异常处理不当漏洞，该漏洞源于@opentelemetry/propagator-jaeger使用decodeURIComponent()解码入站HTTP标头值时不处理解码错误，可能导致未经身份验证的远程攻击者发送畸形的百分号编码值，抛出未捕获的URIEr
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry opentelemetry-js < 2.9.0 -

II. Public POCs for CVE-2026-59892

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6948 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-59892

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Patches & Fixes for CVE-2026-59892 (1)

Vendor Advisories for CVE-2026-59892 (1)

Vendor Pages for CVE-2026-59892 (1)

IV. Related Vulnerabilities

Same product: opentelemetry-js
Same vendor: open-telemetry
Same weakness: CWE-248

V. Comments for CVE-2026-59892

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