CVE-2023-43810— opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics
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I. Basic Information for CVE-2023-43810
Vulnerability Information
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Vulnerability Title
opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, logs. Autoinstrumentation out of the box adds the label `http_method` that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. HTTP method for requests can be easily set by an attacker to be random and long. In order to be affected program has to be instrumented for HTTP handlers and does not filter any unknown HTTP methods on the level of CDN, LB, previous middleware, etc. This issue has been patched in version 0.41b0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenTelemetry-Go Contrib 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry-Go Contrib是OpenTelemetry开源的一个 OpenTelemetry Go的扩展集合。 OpenTelemetry-Go Contrib存在资源管理错误漏洞，该漏洞源于opentelemetry-instrumentation功能存在拒绝服务（DoS）漏洞。
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-python-contrib | < 0.41b0 | - |
II. Public POCs for CVE-2023-43810
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: open-telemetry
- CVE-2026-41484
OpenTelemetry.Exporter.OneCollector vulnerable to denial of - CVE-2026-41483
Unbounded HTTP response body read in OpenTelemetry.Resources - CVE-2026-41310
OpenTelemetry .NET Zipkin exporter has unbounded remote endp - CVE-2026-41433
OpenTelemetry eBPF Instrumentation: Privileged Java agent in - CVE-2026-41173
Unbounded HTTP response body read in OpenTelemetry.Sampler.A
Same weakness: CWE-400
- CVE-2026-8187
Open5GS UPF gtp-path.c _gtpv1_u_recv_cb resource consumption - CVE-2026-42343
FastGPT: Uncontrolled Resource Consumption leading to Sandbo - CVE-2026-42212
SolidCAM-GPPL-IDE: XML External Entity (XXE) and billion-lau - CVE-2026-32686
Unbounded exponent in decimal enables unauthenticated DoS - CVE-2026-20188
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V. Comments for CVE-2023-43810
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