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CVE-2026-81870: open-telemetry opentelemetry-go

CVSS: 2.0v4.0LowDeferred
AliasesUBUNTU-CVE-2026-81870DEBIAN-CVE-2026-81870CGA-225m-rf92-8xhf
Published 16-09-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-81870 is a low (CVSS 2.0) vulnerability in open-telemetry opentelemetry-go. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.6% of scored vulnerabilities.

Overall risk
8/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.0/10
010
Low · v4.0 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11931-1OPENSUSE-SU-2026:11963-1OPENSUSE-SU-2026:22057-1SUSE-SU-2026:24120-1

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.5.0 to 1.44.0, sdk/trace.NewTracerProvider emits a TracerProvider created internal Info-level diagnostic event whose MarshalLog implementations recursively include span processor, exporter, and client configuration. Applications that call otel.SetLogger to enable OpenTelemetry internal Info logging can therefore record OTLP gRPC and HTTP collector endpoints, the OTLP HTTP Insecure flag, and complete Zipkin collector URLs. A person or system with access to those logs can learn internal collector topology and can recover credentials or tokens embedded in Zipkin URL user information or query strings. The default OpenTelemetry logger does not emit the event, and this path does not log OTLP authentication headers, TLS key material, or span payloads. This issue is fixed in version 1.45.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

+0.01 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard200 products
  • aactl< 0.4.12-r77
  • act< 0.2.89-r11
  • addon-resizer< 1.8.24-r6
  • addon-resizer-fips< 1.8.24-r6
  • agentbeat< 9.2.7-r30

1 vendor · 200 products · Showing 200 of 2934. Use Open JSON for the complete list.

References

11 links
Show all 11 references