CVE-2026-72827 getgrav CVE debrief

Who should care

Defenders responsible for Grav CMS installations, particularly those with low-privileged page editors, should assess exposure and apply patches or mitigations to prevent remote code execution.

Why it matters

CVE-2026-72827 is a high-severity vulnerability in Grav CMS that allows remote code execution via server-side template injection. Defenders should prioritize verifying exposure and applying patches or mitigations to prevent exploitation.

• Remote code execution via email-action parameters
• Potential for arbitrary operating-system command execution
• Exposure of Grav CMS installations to low-privileged page editors
• Verification of patch application and vulnerability mitigation

Technical summary

The vulnerability is caused by unsandboxed use of the find filter in email subject, body, to, or from fields, allowing low-privileged page editors to inject Twig payloads and execute arbitrary operating-system commands. This occurs in Grav CMS before version 2.0.13. The vulnerability allows remote code execution when forms are submitted. Defenders should prioritize verifying exposure and applying patches or mitigations, as the vulnerability allows remote code execution with a high severity score of 8.7. The CVE record and NVD entry provide details on the vulnerability.

Defensive priority

Defenders should prioritize verifying exposure and applying patches or mitigations, as the vulnerability allows remote code execution.

Recommended defensive actions

• Verify Grav CMS version and apply patch to version 2.0.13 or later
• Restrict access to email-action parameters for low-privileged page editors
• Monitor for suspicious email activity and Twig payload injections
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but vendor-provided patches or additional information are not available in the corpus. The vulnerability was disclosed on 2026-08-14 and has not been modified since then. The CVE Program record and NVD detail page offer source-provided CVE metadata and official vulnerability assessment. However, defenders should verify the affected scope, severity, and vendor guidance through official advisories or CVE records.

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.