CVE-2026-40894

MEDIUM EPSS 36.4%
Published Apr 23, 20262mo ago · Modified Jun 17, 20262w ago
5.3 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. 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.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
36.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-789

Affected Products 3

VendorProductVersionRange
opentelemetryopentelemetry*≥0.5.0  –  <1.15.3
opentelemetryopentelemetry.api*≥0.5.0  –  <1.15.3
opentelemetryopentelemetry.extensions.propagators*>1.3.0  –  <1.15.3

References 6

  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/533
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j
    MitigationVendor Advisory

Remediation

  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/533
    Issue TrackingPatch
  • github.com https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061
    Issue TrackingPatch