CVE-2026-39883: OpenTelemetry-Go is the Go implementation of OpenTelemetry

Routine

HIGH 7.0UPGRADE

CVE-2026-39883 is a high-severity flaw (CVSS 7.0) affecting opentelemetry. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-426
Published	2026-04-08
Last modified	2026-09-09

Publisher (CNA): GitHub, Inc. · Vendor: opentelemetry

Last updated 2026-09-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 21:17 UTCPublished CVE record published
2026-09-09 13:19 UTCUpdated Record last modified

opentelemetry opentelemetry UPGRADE

Affected: >= 1.15.0 and < 1.43.0

Fixed in: 1.43.0

Safe to downgrade to: a release before 1.15.0

1. Check installed version

apt-cache policy opentelemetry || rpm -q opentelemetry || opentelemetry --version

2. UPGRADE to 1.43.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opentelemetry

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opentelemetry

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.15.0 (Debian / Ubuntu)

apt-cache madison opentelemetry sudo apt install opentelemetry=<VERSION_BEFORE_1.15.0> sudo apt-mark hold opentelemetry

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list opentelemetry sudo dnf downgrade opentelemetry-<VERSION_BEFORE_1.15.0> sudo dnf versionlock add opentelemetry

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39883?

opentelemetry: upgrade to 1.43.0. Exact commands for each OS are on this page.

Is CVE-2026-39883 being exploited?

CVE-2026-39883 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39883 affect?

CVE-2026-39883 affects opentelemetry. Severity is high (CVSS 7.0). 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 h

How urgent is CVE-2026-39883?

Priority 34/100. High severity; Public exploit reference

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References

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