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CVE-2025-31726: Jenkins Stack Hammer Plugin 1.0.6 and earlier stores Stack Hammer API keys unencrypted in job config.xml files

25
Routine
MEDIUM 5.5UPGRADE

CVE-2025-31726 is a medium-severity flaw (CVSS 5.5) affecting stack hammer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jenkins Stack Hammer Plugin 1.0.6 and earlier stores Stack Hammer API keys unencrypted in job config.xml files on the Jenkins controller where they can be viewed by users with Extended Read permission, or access to the Jenkins controller file system.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionRequired
EPSS exploit chance0.3% (top 79%)
CISA exploited listNo
WeaknessCWE-284
Published2025-04-02
Last modified2026-06-17
Publisher (CNA): Jenkins Project · Vendor: jenkins

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

Am I affected?

Timeline

jenkins stack hammer UPGRADE
Affected: <= 1.0.6
Fixed in: newer than 1.0.6
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy stack-hammer || rpm -q stack-hammer || stack-hammer --version
2. UPGRADE to newer than 1.0.6 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade stack-hammer
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade stack-hammer
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-2025-31726?

stack hammer: upgrade to newer than 1.0.6. Exact commands for each OS are on this page.

Is CVE-2025-31726 being exploited?

CVE-2025-31726 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-2025-31726 affect?

CVE-2025-31726 affects stack hammer. Severity is medium (CVSS 5.5). Jenkins Stack Hammer Plugin 1.0.6 and earlier stores Stack Hammer API keys unencrypted in job config.xml files on the Jenkins controller where they can be viewed by users with Extended Read permission, or access to the Jenkins controller fi

How urgent is CVE-2025-31726?

Priority 25/100. No elevated risk signals yet.

Software pages

Jenkins vulnerabilities

References

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