GHSA-hfvc-g4fc-pqhx

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Source
https://github.com/advisories/GHSA-hfvc-g4fc-pqhx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-hfvc-g4fc-pqhx/GHSA-hfvc-g4fc-pqhx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-hfvc-g4fc-pqhx
Aliases
  • CVE-2026-39883
Downstream
Related
Published
2026-04-08T19:22:12Z
Modified
2026-04-09T14:48:40.875909Z
Severity
  • 7.3 (High) CVSS_V4 - 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 CVSS Calculator
Summary
opentelemetry-go: BSD kenv command not using absolute path enables PATH hijacking
Details

Summary

The fix for GHSA-9h8m-3fm2-qjrq (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.

Root Cause

sdk/resource/host_id.go line 42:

if result, err := r.execCommand("kenv", "-q", "smbios.system.uuid"); err == nil {

Compare with the fixed Darwin path at line 58:

result, err := r.execCommand("/usr/sbin/ioreg", "-rd1", "-c", "IOPlatformExpertDevice")

The execCommand helper at sdk/resource/host_id_exec.go uses exec.Command(name, arg...) which searches $PATH when the command name contains no path separator.

Affected platforms (per build tag in host_id_bsd.go:4): DragonFly BSD, FreeBSD, NetBSD, OpenBSD, Solaris.

The kenv path is reached when /etc/hostid does not exist (line 38-40), which is common on FreeBSD systems.

Attack

  1. Attacker has local access to a system running a Go application that imports go.opentelemetry.io/otel/sdk
  2. Attacker places a malicious kenv binary earlier in $PATH
  3. Application initializes OpenTelemetry resource detection at startup
  4. hostIDReaderBSD.read() calls exec.Command("kenv", ...) which resolves to the malicious binary
  5. Arbitrary code executes in the context of the application

Same attack vector and impact as CVE-2026-24051.

Suggested Fix

Use the absolute path:

if result, err := r.execCommand("/bin/kenv", "-q", "smbios.system.uuid"); err == nil {

On FreeBSD, kenv is located at /bin/kenv.

Database specific 
{
    "cwe_ids": [
        "CWE-426"
    ],
    "github_reviewed_at": "2026-04-08T19:22:12Z",
    "nvd_published_at": "2026-04-08T21:17:00Z",
    "severity": "HIGH",
    "github_reviewed": true
}
References

Affected packages

Go / go.opentelemetry.io/otel/sdk

Package

Name
go.opentelemetry.io/otel/sdk
View open source insights on deps.dev
Purl
pkg:golang/go.opentelemetry.io/otel/sdk

Affected ranges

Type
SEMVER
Events
Introduced
1.15.0
Fixed
1.43.0

Database specific

last_known_affected_version_range 
"<= 1.42.0"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-hfvc-g4fc-pqhx/GHSA-hfvc-g4fc-pqhx.json"