CVE-2026-33376
Published:May 13, 2026
Updated:May 25, 2026
When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.
Affected Packages
https://github.com/grafana/grafana.git (GITHUB):
Affected version(s) >=v0.0.0-cloud <v11.6.14+security-04Fix Suggestion:
Update to version v11.6.14+security-04https://github.com/grafana/grafana.git (GITHUB):
Affected version(s) >=v12.3.0 <v12.3.6+security-04Fix Suggestion:
Update to version v12.3.6+security-04https://github.com/grafana/grafana.git (GITHUB):
Affected version(s) >=v12.4.0 <v12.4.3+security-02Fix Suggestion:
Update to version v12.4.3+security-02https://github.com/grafana/grafana.git (GITHUB):
Affected version(s) =v13.0.0 <v13.0.1+security-01Fix Suggestion:
Update to version v13.0.1+security-01https://github.com/grafana/grafana.git (GITHUB):
Affected version(s) >=v12.0.0 <v12.2.8+security-04Fix Suggestion:
Update to version v12.2.8+security-04github.com/grafana/grafana (GO):
Affected version(s) >=v0.0.0-20251020084502-5c5ecac6eea6 <v0.0.0-20260512043321-4299b9d2685aFix Suggestion:
Update to version v0.0.0-20260512043321-4299b9d2685aRelated Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Initialization of a Resource with an Insecure Default
EPSS
Base Score:
0.01