CVE-2026-117620 Jenkins Project CVE debrief

Who should care

Defenders responsible for Jenkins instances, especially those with untrusted users having Overall/Read permission, should assess exposure and prioritize verifying the impact of this vulnerability.

Why it matters

CVE-2026-117620 is a high-severity vulnerability in Jenkins that allows attackers to inject data via the 'Manage Old Data' feature, potentially leading to account compromise and disruption of Jenkins instance operations. Defenders responsible for Jenkins instances should assess exposure and prioritize verifying the impact of this vulnerability, especially in environments with untrusted users having Overall/Read permission.

• Potential data injection and account compromise
• Elevation of privileges for attackers with Overall/Read permission
• Possible disruption of Jenkins instance operations
• Need for verification of exposure and impact

Technical summary

CVE-2026-117620 is a high-severity vulnerability in Jenkins that allows attackers with Overall/Read permission to trigger warnings in the 'Manage Old Data' feature. This can be acted on by administrators to inject attacker-controlled data, overriding existing user account information, including login passwords. The vulnerability has a CVSS score of 8.8 and affects Jenkins versions 2.587 and earlier, LTS 2.580.1 and earlier.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their Jenkins instances, especially those with untrusted users having Overall/Read permission.

Recommended defensive actions

• Verify Jenkins instance exposure and assess impact
• Restrict Overall/Read permission to trusted users
• Monitor for suspicious activity in 'Manage Old Data' feature
• Apply vendor-provided patches or mitigations
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, its CVSS score, and affected versions of Jenkins. The vulnerability allows attackers with Overall/Read permission to trigger warnings in the 'Manage Old Data' feature, which can be acted on by administrators to inject attacker-controlled data. Defenders should verify exposure and assess the impact of this vulnerability on their Jenkins instances, especially those with untrusted users having Overall/Read permission. The information available does

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.