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CVE-2026-40891

MEDIUM · CVSS 5.3 EPSS 0.02% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-04-23 · Last synced: 2026-05-23

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-40891
Severity
MEDIUM
CVSS
5.3
EPSS
0.02%

Original NVD 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.