CVE-2026-111627 hestiacp CVE debrief

Who should care

Defenders responsible for HestiaCP installations should assess exposure and prioritize upgrading to 1.10.5. They should verify their installations, review and restrict cron job creation permissions, and monitor for suspicious cron job activity. Security teams and vulnerability management teams should also be aware of this vulnerability and its potential impact on their systems.

Why it matters

Defenders should care about CVE-2026-111627 because it allows unauthorized administrators to impersonate the ROOT_USER account, potentially leading to unauthorized cron job creation and privilege elevation. HestiaCP versions before 1.10.5 are affected, and defenders should verify their installations and prioritize upgrades.

• Potential unauthorized cron job creation
• Possible elevation of privileges
• Required verification of HestiaCP versions
• Necessity for timely upgrades to 1.10.5

Technical summary

HestiaCP before 1.10.5 contains an authorization bypass vulnerability allowing non-ROOT_USER administrators to perform write actions while impersonating the protected ROOT_USER account. This can lead to unauthorized cron job creation and potential privilege elevation. The vulnerability exists because the read-only flag is never checked, causing crond to run commands as the protected administrator's system account. Defenders should prioritize verifying HestiaCP versions and upgrading to 1.10.5 if vulnerable. The CVE record and source item provide details on the vulnerability's existence and its potential impact.

Defensive priority

Defenders should prioritize verifying HestiaCP versions and upgrading to 1.10.5 if vulnerable.

Recommended defensive actions

• Verify HestiaCP version and upgrade to 1.10.5 if vulnerable
• Review and restrict cron job creation permissions
• Monitor for suspicious cron job activity
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the authorization bypass vulnerability in HestiaCP before 1.10.5. The vulnerability allows non-ROOT_USER administrators to perform write actions while impersonating the protected ROOT_USER account. Defenders should verify HestiaCP versions and prioritize upgrades to 1.10.5 if vulnerable. The source item and CVE record provide evidence of the vulnerability's existence and its potential impact.

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.