Bug 2506342 (CVE-2026-21723) - CVE-2026-21723 grafana: Grafana: Denial of Service via uncontrolled memory usage in alertmanager templates
Summary: CVE-2026-21723 grafana: Grafana: Denial of Service via uncontrolled memory us...
Keywords:
Status: NEW
Alias: CVE-2026-21723
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2506749
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-23 03:01 UTC by OSIDB Bzimport
Modified: 2026-09-08 13:24 UTC (History)
16 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-23 03:01:26 UTC 
The alertmanager templates test endpoint (/api/alertmanager/grafana/config/api/v1/templates/test) can execute templates with no memory limits. Mass-executing templates in a short period causes OOM and crashes the Grafana service. The endpoint requires very low privileges and is exploitable with anonymous access enabled.
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