Vulnerability · Published Oct 28, 2026 · Assigned by GRAFANA
CVE-2026-88858Server-side expression parser denial of service
Medium 6.5
In plain English
A medium-severity improper input validation in Grafana Enterprise from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 72.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | grafana | 12.4.14-r0 | ALPINE-CVE-2026-88858 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana OSS | 7.4.0 – through 11.6.1612.0.0 – through 12.2.1012.3.0 – through 12.3.1112.4.0 – through 12.4.1313.0.0 – through 13.0.1113.1.0 – through 13.1.813.2.0 – through 13.2.4 |
| Grafana | Grafana Enterprise | 7.4.0 – through 11.6.1612.0.0 – through 12.2.1012.3.0 – through 12.3.1112.4.0 – through 12.4.1313.0.0 – through 13.0.1113.1.0 – through 13.1.813.2.0 – through 13.2.4 |
Weakness: CWE-674, CWE-20, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://grafana.com/security/security-advisories/cve-2026-88858 vendor-advisory