CVE-2026-88858

Server-side expression parser denial of service

State: Published
Severity: 6.5 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 10, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	GRAFANA

Weaknesses

Affected Products

Product	Versions
Grafana OSSGrafana	7.4.0 through 11.6.16Affected 12.0.0 through 12.2.10Affected 12.3.0 through 12.3.11Affected 12.4.0 through 12.4.13Affected 13.0.0 through 13.0.11Affected 13.1.0 through 13.1.8Affected 13.2.0 through 13.2.4Affected
Grafana EnterpriseGrafana	7.4.0 through 11.6.16Affected 12.0.0 through 12.2.10Affected 12.3.0 through 12.3.11Affected 12.4.0 through 12.4.13Affected 13.0.0 through 13.0.11Affected 13.1.0 through 13.1.8Affected 13.2.0 through 13.2.4Affected

References

https://grafana.com/security/security-advisories/cve-2026-88858vendor-advisory

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