Medium severity · published Oct 28, 2026
CVE-2026-88858
Server-side expression parser denial of service
New
6.5
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
7.4.0 through 11.6.16; 12.0.0 through 12.2.10; 12.3.0 through 12.3.11; 12.4.0 through 12.4.13; 13.0.0 through 13.0.11; 13.1.0 through 13.1.8; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88858
grafana.com
https://grafana.com/security/security-advisories/cve-2026-88858
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