Bug 2554121 (CVE-2026-88858)

Summary:	CVE-2026-88858 grafana: Math expressions could crash Grafana
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amctagga, aoconnor, bniver, flucifre, gmeno, gparvin, groman, jbalunas, lchilton, mbenjamin, mhackett, rhaigner, rhel-process-autobot, security-response-team, sfeifer, sostapov, tsze, vereddy, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Grafana. An authenticated user, including one with basic viewer privileges, can cause a Denial of Service (DoS) by submitting deeply nested mathematical expressions that crash the server. Additionally, an authorized user can incorporate such expressions into alert rules, causing the service crash to repeat continuously across restarts.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2563423, 2563431
Bug Blocks:
Deadline:	2026-10-28

Description OSIDB Bzimport 2026-10-16 13:56:00 UTC

Short description of the vulnerability: 

A signed-in user, including a user with the Viewer role, could crash Grafana by sending a deeply nested math expression. A user allowed to create alert rules could make the crash repeat on every restart. The fixed versions limit how deeply expressions can be nested. 

Known mitigations: 

There is no simple workaround. Disabling server-side expressions ([expressions] enabled = false) prevents the issue but also disables expression-based alerting. 

Affected products and versions: 

Grafana and Grafana Enterprise 12.4.0 to 12.4.13, 13.0.0 to 13.0.11, 13.1.0 to 13.1.8, and 13.2.0 to 13.2.4. Versions 7.4.0 to 12.3.11 are also affected; they are end of life and will not receive a fix. 

Affected platforms: 

Self-managed (on-premise)