Cyber Resilience

CVE-2026-39883

HighPublic PoCLPEUpdated

Published: 08 April 2026

Published
08 April 2026
Modified
30 June 2026
KEV Added
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Patch
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CVSS Score v4 7.3 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0020 9.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-39883 is a high-severity Untrusted Search Path (CWE-426) vulnerability in Opentelemetry Opentelemetry. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception by PATH Environment Variable (T1574.007); ranked at the 9.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

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…

more

attack on BSD and Solaris platforms. This vulnerability is fixed in 1.43.0.

CWE(s)
CWE-426

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1574.007 Path Interception by PATH Environment Variable Stealth
Adversaries may execute their own malicious payloads by hijacking environment variables used to load libraries.
attack.mitre.org →
Why these techniques?

CWE-426 untrusted search path in kenv invocation directly enables PATH environment variable interception for execution hijacking on BSD/Solaris.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

opentelemetry
opentelemetry
1.15.0 — 1.43.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References