What’s Vulnerable › Vulnerabilities

CVE-2026-39883: OpenTelemetry-Go has an incomplete fix for CVE-2026-24051: BSD kenv command not using absolute path enables PATH hijacking

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-08 · updated 2026-09-09
• Weakness: CWE-426

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.

Affected products

• open-telemetry opentelemetry-go: from 1.15.0 before 1.43.0 — fixed in 1.43.0

How to fix

Upgrade to a fixed version: open-telemetry opentelemetry-go 1.43.0. Check the vendor advisory for mitigations.

References

• http://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.43.0
• https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hfvc-g4fc-pqhx
• https://access.redhat.com/errata/RHSA-2026:26254
• https://access.redhat.com/errata/RHSA-2026:26257
• https://access.redhat.com/errata/RHSA-2026:37387
• https://access.redhat.com/errata/RHSA-2026:54274
• https://access.redhat.com/errata/RHSA-2026:54286
• https://access.redhat.com/errata/RHSA-2026:63140
• https://access.redhat.com/security/cve/CVE-2026-39883
• https://bugzilla.redhat.com/show_bug.cgi?id=2456718
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39883.json

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