SB2026013061 - Multiple vulnerabilities in Grafana

Description

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error (CVE-ID: CVE-2026-21720)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: 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

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.

2) Improper privilege management (CVE-ID: CVE-2026-21721)

CWE-ID: CWE-269 - Improper Privilege Management

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to improper privilege management when displaying visualization panels. A remote user can view panels they have no access to.

Remediation

Install update from vendor's website.

References

• https://grafana.com/security/security-advisories/cve-2026-21720/
• https://grafana.com/security/security-advisories/cve-2026-21721/