CVE-2026-40894
Published:April 23, 2026
Updated:April 26, 2026
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 Packages
OpenTelemetry.Api (DOT_NET):
Affected version(s) >=0.5.0.2 <1.15.3Fix Suggestion:
Update to version 1.15.3OpenTelemetry.Extensions.Propagators (DOT_NET):
Affected version(s) >=1.3.1.622 <1.15.3Fix Suggestion:
Update to version 1.15.3opentelemetry.extensions.propagators (NUGET):
Affected version(s) >=1.3.1 <1.15.3Fix Suggestion:
Update to version 1.15.3opentelemetry.api (NUGET):
Affected version(s) >=0.5.0-beta.2 <1.15.3Fix Suggestion:
Update to version 1.15.3Related Resources (10)
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Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Memory Allocation with Excessive Size Value
EPSS
Base Score:
0.02
