How severe is CVE-2026-39883?

CVE-2026-39883 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-39883 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39883?

CVE-2026-39883 affects Opentelemetry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39883?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39883 have an EU (EUVD) identifier?

Yes. CVE-2026-39883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20630.

When was CVE-2026-39883 published?

CVE-2026-39883 was published on 2026-04-08 and last updated on 2026-06-30.

CVE-2026-39883

CVE-2026-39883 is a high-severity vulnerability in Opentelemetry with a CVSS 3.x base score of 7.0. 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-426.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v4: 7.3
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20630
Weakness: CWE-426
Affected product: Opentelemetry
Published: 2026-04-08
Last modified: 2026-06-30

Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 changed the Darwin ioreg command to use an absolute path but left the BSD kenv command using a bare name, allowing the same PATH hijacking attack on BSD and Solaris platforms. This vulnerability is fixed in 1.43.0.

Frequently asked questions

What is CVE-2026-39883?: OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 changed the Darwin ioreg command to use an absolute path but left the BSD kenv command using a bare name, allowing the same PATH hijacking attack on BSD and Solaris platforms. This vulnerability is fixed in 1.43.0.
How severe is CVE-2026-39883?: CVE-2026-39883 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-39883 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39883?: CVE-2026-39883 affects Opentelemetry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39883?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39883 have an EU (EUVD) identifier?: Yes. CVE-2026-39883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20630.
When was CVE-2026-39883 published?: CVE-2026-39883 was published on 2026-04-08 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:go:*:*

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