High severity · published Mar 27, 2026
CVE-2026-27880
OpenFeature evaluation API reads input data with no bounds
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
v12.1.0 before v12.1.10; v12.2.0 before v12.2.8; v12.3.0 before v12.3.6; v12.4.0 before v12.4.2 · source: vendor, NVD
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27880
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27880
Vendor Advisory
https://grafana.com/security/security-advisories/cve-2026-27880
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-27880
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2452295
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27880.json
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