CVE-2026-40891
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
46/100
Published: 2026-04-23
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Adjacent
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Adjacent
AC:
High
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| opentelemetry | opentelemetry | 1.13.1 – 1.15.3 |
References & Advisories (3)
Mitigation
Vendor Advisory
Issue Tracking
Patch
Issue Tracking
Patch