Skip to content
Fencer Vulns
high 7.5

CVE-2026-27880 json

OpenFeature evaluation API reads input data with no bounds

published 2026-03-27 7 mo ago modified 2026-09-08 2 mo ago also BIT-grafana-2026-27880 , EUVD-2026-16598

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

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

Patch / fix

  • bitnami grafana 12.1.10, 12.2.8, 12.3.6, 12.4.2
  • Grafana Grafana v12.1.10, v12.2.8, v12.3.6, v12.4.2
  • grafana Alpine 3.23 12.2.8-r0
  • grafana Alpine 3.24 12.4.3-r0

alpine advisories ALPINE-CVE-2026-27880

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-27880 updated cvss 7.5

Grafana: Grafana: Denial of Service via unbounded memory read in feature toggle evaluation

  • Red Hat Enterprise Linux 9 grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami grafana
>=12.1.0, <12.1.10
>=12.2.0, <12.2.8
>=12.3.0, <12.3.6
>=12.4.0, <12.4.2
12.1.10
12.2.8
12.3.6
12.4.2

Affected products

  • Grafana Grafana
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: NVD has incorrect affected ranges. They incorrectly interpreted the fixed ranges as affected ranges.