TI-2025-20345 Aliases CVE-2025-27513 GHSA-8785-wc3w-h8q6

OpenTelemetry .NET has a Denial of Service (DoS) Vulnerability in API Package

LOW 33CWE-770Published 2025-03-05 · Updated 2025-03-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

OpenTelemetry dotnet is a dotnet telemetry framework. A vulnerability in OpenTelemetry.Api package 1.10.0 to 1.11.1 could cause a Denial of Service (DoS) when a tracestate and traceparent header is received. Even if an application does not explicitly use trace context propagation, receiving these headers can still trigger high CPU usage. This issue impacts any application accessible over the web or backend services that process HTTP requests containing a tracestate header. Application may experience excessive resource consumption, leading to increased latency, degraded performance, or downtime. This vulnerability is fixed in 1.11.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00507 43rd percentileScored 2026-11-07

Fix Fixed opentelemetry-dotnet (open-telemetry): 1.11.2OpenTelemetry.Api (NuGet): 1.11.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
open-telemetry	opentelemetry-dotnet	1.10.0-beta.1 to before 1.11.2	1.11.2	Patch available	CNA
—	OpenTelemetry.Api (NuGet)	1.11.0 to before 1.11.2	1.11.2	Patch available	GHSA-8785-wc3w-h8q6
—	OpenTelemetry.Api (NuGet)	—	—	No fix listed	GHSA-8785-wc3w-h8q6
—	OpenTelemetry.Api (NuGet)	—	—	No fix listed	GHSA-8785-wc3w-h8q6
—	OpenTelemetry.Api (NuGet)	—	—	No fix listed	GHSA-8785-wc3w-h8q6
—	OpenTelemetry.Api (NuGet)	—	—	No fix listed	GHSA-8785-wc3w-h8q6

opentelemetry-dotnet Vendoropen-telemetry Affected 1.10.0-beta.1 to before 1.11.2 Fixed in 1.11.2 Patch available CNA
OpenTelemetry.Api (NuGet) Vendor— Affected 1.11.0 to before 1.11.2 Fixed in 1.11.2 Patch available GHSA-8785-wc3w-h8q6
OpenTelemetry.Api (NuGet) Vendor— Affected — Fixed in — No fix listed GHSA-8785-wc3w-h8q6
OpenTelemetry.Api (NuGet) Vendor— Affected — Fixed in — No fix listed GHSA-8785-wc3w-h8q6
OpenTelemetry.Api (NuGet) Vendor— Affected — Fixed in — No fix listed GHSA-8785-wc3w-h8q6
OpenTelemetry.Api (NuGet) Vendor— Affected — Fixed in — No fix listed GHSA-8785-wc3w-h8q6

Remediation

Fix · CNA opentelemetry-dotnet (open-telemetry) Fixed in 1.11.2
Fix · GHSA-8785-wc3w-h8q6 OpenTelemetry.Api (NuGet) Fixed in 1.11.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-27513
2026-10-03 Alias added: GHSA-8785-wc3w-h8q6

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-27513

Other 4

TI-2024-23957 OpenTelemetry Collector has a Denial of Service via Zip/Decompression Bomb sent over HTTP or gRPC CVSS 3.1HIGH 8.2
TI-2026-42706 OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header CVSS 3.1HIGH 7.5
TI-2026-33428 OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI CVSS 3.1HIGH 7.5
TI-2026-33427 OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages CVSS 3.1HIGH 7.5
TI-2026-33420 OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads CVSS 3.1HIGH 7.5
TI-2026-32777 opentelemetry-js: Prometheus exporter process crash via malformed HTTP request CVSS 3.1HIGH 7.5

See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences