CVE-2026-40894
MEDIUMOpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Title source: cnaDescription
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.
References (6)
Scores
CVSS v3
5.3
EPSS
0.0003
EPSS Percentile
7.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-789
Status
published
Products (8)
nuget/OpenTelemetry.Api
0.5.0-beta.2 - 1.15.3NuGet
nuget/OpenTelemetry.Extensions.Propagators
1.3.1 - 1.15.3NuGet
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
Published
Apr 23, 2026
Tracked Since
Apr 24, 2026