How severe is CVE-2026-41310?

CVE-2026-41310 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-41310 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41310?

CVE-2026-41310 affects Opentelemetry Opentelemetry.exporter.zipkin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41310?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41310 have an EU (EUVD) identifier?

Yes. CVE-2026-41310 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28222.

When was CVE-2026-41310 published?

CVE-2026-41310 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-41310

CVE-2026-41310 is a medium-severity vulnerability in Opentelemetry Opentelemetry.exporter.zipkin with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28222
Weakness: CWE-400
Affected product: Opentelemetry Opentelemetry.exporter.zipkin
Published: 2026-05-06
Last modified: 2026-06-17

Description

OpenTelemetry.Exporter.Zipkin is the .NET Zipkin exporter for OpenTelemetry. In versions 1.15.2 and earlier, the Zipkin exporter remote endpoint cache accepts unbounded key growth derived from span attributes. In high-cardinality scenarios, a process using Zipkin export for client or producer spans could experience avoidable memory growth under sustained unique remote endpoint values, increasing process memory usage over time and degrading availability. This issue is fixed in version 1.15.3, which introduces a bounded, thread-safe LRU cache for remote endpoints with a fixed maximum size.

Frequently asked questions

What is CVE-2026-41310?: OpenTelemetry.Exporter.Zipkin is the .NET Zipkin exporter for OpenTelemetry. In versions 1.15.2 and earlier, the Zipkin exporter remote endpoint cache accepts unbounded key growth derived from span attributes. In high-cardinality scenarios, a process using Zipkin export for client or producer spans could experience avoidable memory growth under sustained unique remote endpoint values, increasing process memory usage over time and degrading availability. This issue is fixed in version 1.15.3, which introduces a bounded, thread-safe LRU cache for remote endpoints with a fixed maximum size.
How severe is CVE-2026-41310?: CVE-2026-41310 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-41310 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41310?: CVE-2026-41310 affects Opentelemetry Opentelemetry.exporter.zipkin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41310?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41310 have an EU (EUVD) identifier?: Yes. CVE-2026-41310 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28222.
When was CVE-2026-41310 published?: CVE-2026-41310 was published on 2026-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opentelemetry:opentelemetry.exporter.zipkin:*:*:*:*:*:.net:*:*

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