Resource management error in Grafana - CVE-2026-21720
Published: January 30, 2026
Vulnerability identifier: #VU122160
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-21720
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Grafana Labs
Affected software:
Grafana
Grafana
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application when caching avatars from the Gravatar service API. If such a request times out after 3 seconds a Goroutine is left running consuming system resources.
How to mitigate CVE-2026-21720
Install updates from vendor's website.