CVE-2026-40894 — Denial of Service
CVE-2026-40894 — 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.
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-2026-40894 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-40894 - OpenTelemetry .NET Excessive Memory Allocation DoS
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40894 | vulnerability | CVE-2026-40894 |
| CWE-789 | weakness | CWE-789 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 23, 2026 at 22:17 UTC |
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