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5.3Medium

CVE-2026-40894OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

open-telemetry opentelemetry-dotnet; open-telemetry OpenTelemetry.Api; open-telemetry OpenTelemetry.Extensions.Propagators Published: (6 months ago)

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.

Weakness (CWE): CWE-789

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
open-telemetry opentelemetry-dotnet >= 0.5.0-beta.2, < 1.15.3
open-telemetry OpenTelemetry.Api >= 0.5.0-beta.2, < 1.15.3
open-telemetry OpenTelemetry.Extensions.Propagators >= 1.3.1, < 1.15.3
opentelemetry opentelemetry 0.5.0 – < 1.15.3
opentelemetry opentelemetry.api 0.5.0 – < 1.15.3
opentelemetry opentelemetry.extensions.propagators 1.3.0 – < 1.15.3

References and patches

CPE matches (NVD) (3)
  • cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:* ≥ 0.5.0 < 1.15.3
  • cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:* ≥ 0.5.0 < 1.15.3
  • cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:* ≥ 1.3.0 < 1.15.3