What is CVE-2026-88858?

CVE-2026-88858 is a medium-severity vulnerability in Grafana Enterprise, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-10-28.

How severe is CVE-2026-88858?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Grafana Enterprise

CVE-2026-88858

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-10-28.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

grafana.com/security/security-advisories/cve-2026-88858 (vendor-advisory)

Frequently asked questions

What is CVE-2026-88858?: CVE-2026-88858 is a medium-severity vulnerability in Grafana Enterprise, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-10-28.
How severe is CVE-2026-88858?: Medium severity. CVSS v3 base score is 6.5 out of 10.