SB2026090453 - Multiple vulnerabilities in Grafana Enterprise

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authentication (CVE-ID: CVE-2026-14199)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to bypass authentication and impersonate higher-privileged users.

The vulnerability exists due to improper cache key construction in the Auth Proxy identity cache when generating cache keys from usernames and forwarded identity attributes. A remote user can shape their identity attributes to collide with another user\'s cache key to bypass authentication and impersonate higher-privileged users.

Only self-managed instances with Auth Proxy authentication and identity caching enabled with sync_ttl greater than zero are affected. Exploitation requires a higher-privileged user\'s cache entry to be live.

2) Authentication Bypass by Capture-replay (CVE-ID: CVE-2026-12704)

CWE-ID: CWE-294 - Authentication Bypass by Capture-replay

CVSSv4: 7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to gain a session as the victim user.

The vulnerability exists due to improper validation of the InResponseTo field in the SAML library when processing SAML responses. A remote attacker can replay a valid signed SAML assertion to gain a session as the victim user.

User interaction is required, and only instances with the allow_idp_initiated SAML setting enabled are affected.

Remediation

Install update from vendor's website.

References

• https://grafana.com/security/security-advisories/cve-2026-14199/
• https://grafana.com/security/security-advisories/cve-2026-12704/