CVE-2026-40182

MEDIUM EPSS 22.1%
Published Apr 23, 20262mo ago · Modified Jun 17, 20262w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Apr 23, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.

CVSS Details

Base Score
5.9
Exploitability
2.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
22.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-789

Affected Products 1

VendorProductVersionRange
opentelemetryopentelemetry*≥1.13.1  –  <1.15.2

References 4

  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933
    Vendor Advisory
  • github.com https://github.com/open-telemetry/opentelemetry-proto/pull/781
    Issue Tracking

Remediation

  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017
    Issue TrackingPatch