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

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.

Published: 2026-04-23 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-41078 is rated Low Risk (28.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.22%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-41078

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.22% +0.17%
2 2026-04-29 0.04% 0.06% +0.02%
3 2026-04-24 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-41078

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]

Weakness enumeration for CVE-2026-41078

GitHub Security Advisory for CVE-2026-41078

GHSA-38h3-2333-qx47 · Severity: medium · Ecosystem: nuget — OpenTelemetry .NET has potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path

Affected software / configurations for CVE-2026-41078

Vendor Product Version Raw CPE
opentelemetry opentelemetry < 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*
opentelemetry opentelemetry 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:1.6.0:alpha1:*:*:*:.net:*:*
opentelemetry opentelemetry 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:1.6.0:beta1:*:*:*:.net:*:*
opentelemetry opentelemetry 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:1.6.0:beta2:*:*:*:.net:*:*
opentelemetry opentelemetry 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:1.6.0:beta3:*:*:*:.net:*:*
opentelemetry opentelemetry 1.6.0 cpe:2.3:a:opentelemetry:opentelemetry:1.6.0:rc1:*:*:*:.net:*:*

References for CVE-2026-41078

cvelogic Threat Intelligence