CVE-2026-40894

OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

Published Apr 23, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-g94r-2vxg-569j OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
History
Type Values Removed Values Added
First Time appeared Opentelemetry opentelemetry
CPEs cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*
cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*
Vendors & Products Opentelemetry opentelemetry
Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-dotnet
Opentelemetry opentelemetry.api
Opentelemetry opentelemetry.extensions.propagators
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-dotnet
Opentelemetry opentelemetry.api
Opentelemetry opentelemetry.extensions.propagators
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Apr 23, 2026, 7:22 PM
Reserved
Apr 15, 2026, 4:37 PM
Status
Analyzed
Published
Apr 23, 2026, 7:17 PM
Modified
Oct 26, 2026, 10:10 PM