# CVE-2026-88858: Server-side expression parser denial of service

> CVE-2026-88858: Server-side expression parser denial of service. CVSS 6.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-88858
Last updated: 2026-10-29T15:29:45Z

- Published: 2026-10-28 16:50 UTC · Updated: 2026-10-29 15:29 UTC · Assigner: GRAFANA
- CVSS: 6.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.34%, 27th percentile (scored 2026-11-03)
- CISA KEV: no
- CWE: CWE-20, CWE-400, CWE-674

## 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 vendors and products

- Grafana: Grafana Enterprise
- Grafana: Grafana OSS

## Tracked companies

- [Grafana Cloud](https://rewindex.com/company/grafana-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-88858)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-88858)
- [https://grafana.com/security/security-advisories/cve-2026-88858](https://grafana.com/security/security-advisories/cve-2026-88858)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-88858 · Markdown: https://rewindex.com/cve/CVE-2026-88858.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-88858 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:28:45.107Z