CVE-2026-41310: OpenTelemetry.Exporter.Zipkin is the .NET Zipkin exporter for OpenTelemetry

Q: How do I fix CVE-2026-41310?

opentelemetry.exporter.zipkin: upgrade to 1.15.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-41310 being exploited?

CVE-2026-41310 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41310 affect?

CVE-2026-41310 affects opentelemetry.exporter.zipkin. Severity is medium (CVSS 5.3). 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,

Q: How urgent is CVE-2026-41310?

Priority 29/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-41310 is a medium-severity flaw (CVSS 5.3) affecting opentelemetry.exporter.zipkin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 availa

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-400, CWE-770
Published	2026-05-06
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: opentelemetry

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-06 22:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

opentelemetry opentelemetry.exporter.zipkin UPGRADE

Affected: < 1.15.3

Fixed in: 1.15.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy opentelemetry.exporter.zipkin || rpm -q opentelemetry.exporter.zipkin || opentelemetry.exporter.zipkin --version

2. UPGRADE to 1.15.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opentelemetry.exporter.zipkin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opentelemetry.exporter.zipkin

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41310?

opentelemetry.exporter.zipkin: upgrade to 1.15.3. Exact commands for each OS are on this page.

Is CVE-2026-41310 being exploited?

CVE-2026-41310 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41310 affect?

CVE-2026-41310 affects opentelemetry.exporter.zipkin. Severity is medium (CVSS 5.3). 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,

How urgent is CVE-2026-41310?

Priority 29/100. Remotely exploitable, no login, no user action

References

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