CVEvulnerability
CVE-2026-40891
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-23
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-789
Description
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.
Affected configurations
• opentelemetry opentelemetry (>= 1.13.1 < 1.15.3)
Related
Weakness · CWE (1)
- CWE-789 Memory Allocation with Excessive Size Value weakness
References
- 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 Mitigation, Vendor Advisory