CVE-2026-32946: Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners

Q: How do I fix CVE-2026-32946?

harden-runner: upgrade to 2.16.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-32946 being exploited?

CVE-2026-32946 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32946 affect?

CVE-2026-32946 affects harden-runner. Severity is low (CVSS 2.7). Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, the Harden-Runner that allows bypass of the egress-policy: block network restriction using DNS queries over TCP. Egress

Q: How urgent is CVE-2026-32946?

Priority 14/100. No elevated risk signals yet.

Routine

LOW 2.7UPGRADE

CVE-2026-32946 is a low-severity flaw (CVSS 2.7) affecting harden-runner. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, the Harden-Runner that allows bypass of the egress-policy: block network restriction using DNS queries over TCP. Egress policies are enforced on GitHub runners by filtering outbound connections at the network layer. When egress-policy: block is enabled with a restrictive allowed-endpoints list (e.g., only github.com:443), all n

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.7 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-693, CWE-863
Published	2026-03-20
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 04:16 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

stepsecurity harden-runner UPGRADE

Affected: < 2.16.0

Fixed in: 2.16.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy harden-runner || rpm -q harden-runner || harden-runner --version

2. UPGRADE to 2.16.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade harden-runner

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade harden-runner

Note

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

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-2026-32946?

harden-runner: upgrade to 2.16.0. Exact commands for each OS are on this page.

Is CVE-2026-32946 being exploited?

CVE-2026-32946 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-2026-32946 affect?

CVE-2026-32946 affects harden-runner. Severity is low (CVSS 2.7). Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, the Harden-Runner that allows bypass of the egress-policy: block network restriction using DNS queries over TCP. Egress

How urgent is CVE-2026-32946?

Priority 14/100. No elevated risk signals yet.

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-32947 MEDIUM 4.9 UPGRADE Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners

References

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