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HIGH severity

CVE-2020-2146 — mac

HIGHFix: jenkinsci/mac-plugin@ba1a820

CVE-2020-2146 is a high-severity (CVSS 7.4) CWE-347 vulnerability in fr.edf.jenkins.plugins:mac. A fix is available for fr.edf.jenkins.plugins:mac — see the affected versions and patch details below.

Missing SSH host key validation in Mac Plugin

Also known asGHSA-rv9g-67f7-grq7
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs47th percentile — riskier than 47% of all scored CVEsHighest risk
0.00%0.36%0.71%1.07%0.0%0.6%May 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕fr.edf.jenkins.plugins:mac

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Mac Plugin 1.1.0 and earlier does not use SSH host key validation when connecting to Mac Cloud host launched by the plugin. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections to build agents.

Mac Plugin 1.2.0 validates SSH host keys when connecting to agents.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenfr.edf.jenkins.plugins:macall versions1.2.0fr.edf.jenkins.plugins:mac:1.2.0

Affected Products

1 product · 1 configurations
Application
macjenkins
≤ 1.1.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for fr.edf.jenkins.plugins:mac, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update fr.edf.jenkins.plugins:mac to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-2146 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Mac Plugin 1.1.0 and earlier does not use SSH host key validation when connecting to Mac Cloud host launched by the plugin. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections to build agents. Mac Plugin 1.2.0 validates SSH host keys when connecting to agents.
O3 Security · Impact-Aware SCA

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CVE-2020-2146: mac — Fixed in 1.2.0