OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
References
| Link | Resource |
|---|---|
| https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980 | Issue Tracking Patch |
| https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064 | Issue Tracking Patch |
| https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-mr8r-92fq-pj8p | Vendor Advisory Mitigation |
Configurations
History
29 Apr 2026, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980 - Issue Tracking, Patch | |
| References | () https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064 - Issue Tracking, Patch | |
| References | () https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-mr8r-92fq-pj8p - Vendor Advisory, Mitigation | |
| CPE | cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:* | |
| First Time |
Opentelemetry opentelemetry
Opentelemetry |
23 Apr 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-23 18:16
Updated : 2026-04-29 14:15
NVD link : CVE-2026-40891
Mitre link : CVE-2026-40891
CVE.ORG link : CVE-2026-40891
JSON object : View
Products Affected
opentelemetry
- opentelemetry
CWE
CWE-789
Memory Allocation with Excessive Size Value