Buffer overflow in Grafana

CVE-2026-27880

The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-27880: held from 0.008 to 0.006.

EPSS over last 30 days · oldest: 0.008 · newest: 0.006 · change: -0.001

Affected products

  • Grafana — versions v12.1.0, v12.2.0, v12.3.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-27880?
CVE-2026-27880 is a high-severity vulnerability in Grafana, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-03-27.
How severe is CVE-2026-27880?
High severity. CVSS v3 base score is 7.5 out of 10.