Vulnerability · Published Apr 23, 2026 · Assigned by GitHub_M

CVE-2026-41078OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path

Medium 5.9

In plain English

A medium-severity resource allocation without limits in opentelemetry-dotnet from open-telemetry. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 87.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure when the internal pooled-list sizing grows based on a large observed span/tag set and that enlarged size is reused for subsequent allocations. Under high-cardinality or attacker-influenced telemetry input, this can increase memory consumption and potentially cause denial of service. There is no plan to fix this issue as OpenTelemetry.Exporter.Jaeger was deprecated in 2023.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
NuGet	opentelemetry.exporter.jaeger	no fix listed	GHSA-38h3-2333-qx47

Affected products (as reported)

Vendor	Product	Versions
open-telemetry	opentelemetry-dotnet	<= 1.6.0-rc.1
open-telemetry	OpenTelemetry.Exporter.Jaeger	<= 1.6.0-rc.1

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-38h3-2333-qx47 x_refsource_CONFIRM