CVE-2026-41078: open-telemetry opentelemetry-dotnet
Vulnerability summary
CVE-2026-41078 is a medium (CVSS 5.9) vulnerability in open-telemetry opentelemetry-dotnet. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.1% of scored vulnerabilities.
Timeline
- 23-04-2026PublishedVulnerability first disclosed.
- 23-04-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · NugetEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.37%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
+0.14 pp
From 0.22% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Open-telemetry2 products
- opentelemetry-dotnet≤ 1.6.0-rc.1
- opentelemetry.exporter.jaeger≤ 1.6.0-rc.1
NuGet1 product
- OpenTelemetry.Exporter.Jaeger≤ 1.6.0-rc.1
Opentelemetry1 product
- opentelemetry< 1.6.0 | 1.6.0:alpha1 | 1.6.0:beta1 | 1.6.0:beta2 | 1.6.0:beta3 | 1.6.0:rc1
3 vendors · 4 products
References
3 links- github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-38h3-2333-qx47X Refsource CONFIRMWEBVendor Advisory
