What is CVE-2026-27879?

CVE-2026-27879 is a medium-severity vulnerability in Grafana, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-03-27.

How severe is CVE-2026-27879?

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

Buffer overflow in Grafana

CVE-2026-27879

A resample query can be used to trigger out-of-memory crashes in Grafana.

Vulnerability class: Buffer Overflow

Published 2026-03-27 · last modified 2026-06-17.

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

EPSS: 0.004 (33.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Grafana — versions 8.0.0, 12.0.0, 12.2.0

Weakness classification (CWE)

References

grafana.com/security/security-advisories/cve-2026-27879 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-27879?: CVE-2026-27879 is a medium-severity vulnerability in Grafana, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-03-27.
How severe is CVE-2026-27879?: Medium severity. CVSS v3 base score is 6.5 out of 10.