CVE-2026-40894: CWE-789: Memory Allocation with Excessive Size Value in open-telemetry opentelemetry-dotnet
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.
AI Analysis
Technical Summary
CVE-2026-40894 describes a memory allocation vulnerability (CWE-789) in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages for .NET. Specifically, versions from 0.5.0-beta.2 up to but not including 1.15.3 contain parsing code for baggage, B3, and Jaeger that may allocate excessive memory, which could be exploited to cause a denial of service in the consuming application. The vulnerability has a CVSS 3.1 base score of 5.3, indicating medium severity, with no impact on confidentiality or integrity but an impact on availability. The vulnerability is fixed in version 1.15.3.
Potential Impact
The vulnerability can cause a denial of service by exhausting memory resources due to excessive memory allocation during parsing operations in the affected OpenTelemetry dotnet packages. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade affected OpenTelemetry dotnet packages to version 1.15.3 or later, where this vulnerability is fixed. Since this is a library used in applications, updating dependencies to the patched version is the recommended remediation. Patch status is confirmed fixed in 1.15.3.
CVE-2026-40894: CWE-789: Memory Allocation with Excessive Size Value in open-telemetry opentelemetry-dotnet
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40894 describes a memory allocation vulnerability (CWE-789) in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages for .NET. Specifically, versions from 0.5.0-beta.2 up to but not including 1.15.3 contain parsing code for baggage, B3, and Jaeger that may allocate excessive memory, which could be exploited to cause a denial of service in the consuming application. The vulnerability has a CVSS 3.1 base score of 5.3, indicating medium severity, with no impact on confidentiality or integrity but an impact on availability. The vulnerability is fixed in version 1.15.3.
Potential Impact
The vulnerability can cause a denial of service by exhausting memory resources due to excessive memory allocation during parsing operations in the affected OpenTelemetry dotnet packages. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade affected OpenTelemetry dotnet packages to version 1.15.3 or later, where this vulnerability is fixed. Since this is a library used in applications, updating dependencies to the patched version is the recommended remediation. Patch status is confirmed fixed in 1.15.3.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-15T16:37:22.766Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ea6a1a87115cfb68455b93
Added to database: 4/23/2026, 6:51:06 PM
Last enriched: 4/23/2026, 7:06:43 PM
Last updated: 4/24/2026, 6:06:33 AM
Views: 19
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