CVE-2026-40891 — Denial of Service
CVE-2026-40891 — 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 malform
What This Means For You
- If your environment is affected by CWE-789, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-40891 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-40891 - OpenTelemetry dotnet gRPC OTLP Excessive Memory Allocation
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40891 | vulnerability | CVE-2026-40891 |
| CWE-789 | weakness | CWE-789 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 23, 2026 at 21:16 UTC |
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