CVE-2026-40894

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-40894
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.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048 Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244 Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309 Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/533 Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061 Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j Vendor Advisory Mitigation
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*
cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*
cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*
History

28 Apr 2026, 19:34

Type Values Removed Values Added
CPE cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*
cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*
First Time Opentelemetry opentelemetry.extensions.propagators
Opentelemetry opentelemetry.api
Opentelemetry opentelemetry
Opentelemetry
References () https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048 - () https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048 - Issue Tracking, Patch
References () https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244 - () https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244 - Issue Tracking, Patch
References () https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309 - () https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309 - Issue Tracking, Patch
References () https://github.com/open-telemetry/opentelemetry-dotnet/pull/533 - () https://github.com/open-telemetry/opentelemetry-dotnet/pull/533 - Issue Tracking, Patch
References () https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061 - () https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061 - Issue Tracking, Patch
References () https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j - () https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j - Vendor Advisory, Mitigation

23 Apr 2026, 19:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-23 19:17

Updated : 2026-04-28 19:34

NVD link : CVE-2026-40894

Mitre link : CVE-2026-40894

CVE.ORG link : CVE-2026-40894

JSON object : View

Products Affected

opentelemetry

  • opentelemetry.extensions.propagators
  • opentelemetry.api
  • opentelemetry
CWE
CWE-789

Memory Allocation with Excessive Size Value