Server-side expression parser denial of service
Medium
- Advisory ID:
- CVE-2026-88858
- Published:
- 2026-10-27
- Product:
- Grafana
- CVSS Score:
- 6.5
- CVSS Vector:
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Fixed Versions:
- <7.4.0>=12.4.14 <13.0.0>=13.0.12 <13.1.0>=13.1.9 <13.2.0>=13.2.5
Summary
A user with the Viewer role in Grafana can crash the server by submitting a crafted server-side math expression (uncontrolled recursion). A user with permission to provision alert rules can make the outage persist across restarts.
Thanks to Mukul Goyal for reporting this vulnerability to us.