CVE-2026-40894

Summary

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 Software

VendorProductVersion RangeStatus
open-telemetryopentelemetry-dotnet>= 0.5.0-beta.2, < 1.15.3affected
open-telemetryOpenTelemetry.Api>= 0.5.0-beta.2, < 1.15.3affected
open-telemetryOpenTelemetry.Extensions.Propagators>= 1.3.1, < 1.15.3affected

Weaknesses

  • CWE-789: CWE-789: Memory Allocation with Excessive Size Value

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References