open-telemetry opentelemetry-dotnet up to 1.15.2 Zipkin Exporter Remote Endpoint allocation of resources

Summaryinfo

A vulnerability was found in open-telemetry opentelemetry-dotnet up to 1.15.2 and classified as problematic. Affected by this issue is some unknown functionality of the component Zipkin Exporter Remote Endpoint. Such manipulation leads to allocation of resources. This vulnerability is documented as CVE-2026-41310. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in open-telemetry opentelemetry-dotnet up to 1.15.2. It has been rated as problematic. Affected by this issue is an unknown code of the component Zipkin Exporter Remote Endpoint. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

OpenTelemetry.Exporter.Zipkin is the .NET Zipkin exporter for OpenTelemetry. In versions 1.15.2 and earlier, the Zipkin exporter remote endpoint cache accepts unbounded key growth derived from span attributes. In high-cardinality scenarios, a process using Zipkin export for client or producer spans could experience avoidable memory growth under sustained unique remote endpoint values, increasing process memory usage over time and degrading availability. This issue is fixed in version 1.15.3, which introduces a bounded, thread-safe LRU cache for remote endpoints with a fixed maximum size.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-41310 since 04/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• open-telemetry

Name

• opentelemetry-dotnet

Version

• 1.15.0
• 1.15.1
• 1.15.2

Website

• Product: https://github.com/open-telemetry/opentelemetry-dotnet/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion