CVE-2026-40894

Published: Apr 23, 2026Modified: Jun 17, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitability: 3.9 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

Description

OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.

Affected (3)

Products: Opentelemetry: Opentelemetry, Opentelemetry.api, Opentelemetry.extensions.propagators

Opentelemetry

3 products

Opentelemetry

Opentelemetry.api

Opentelemetry.extensions.propagators

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Opentelemetry Opentelemetry	From 0.5.0 to 1.15.3
Opentelemetry Opentelemetry.api	From 0.5.0 to 1.15.3
Opentelemetry Opentelemetry.extensions.propagators	After 1.3.0 to 1.15.3