CVE-2023-3128

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-22 · updated 2026-06-17
Weakness: CWE-290

Description

Grafana is validating Azure AD accounts based on the email claim. On Azure AD, the profile email field is not unique and can be easily modified. This leads to account takeover and authentication bypass when Azure AD OAuth is configured with a multi-tenant app.

Affected products

Grafana: from 6.7.0 before 8.5.27; from 9.2.0 before 9.2.20; from 9.3.0 before 9.3.16; from 9.4.0 before 9.4.13; from 9.5.0 before 9.5.4 — fixed in 8.5.27, 9.2.20, 9.3.16, 9.4.13, 9.5.4

How to fix

Upgrade to a fixed version: Grafana 8.5.27, 9.2.20, 9.3.16, 9.4.13. Check the vendor advisory for mitigations.

References

https://github.com/grafana/bugbounty/security/advisories/GHSA-gxh2-6vvc-rrgp
https://grafana.com/security/security-advisories/cve-2023-3128/
https://security.netapp.com/advisory/ntap-20230714-0004/
https://github.com/grafana/bugbounty/security/advisories/GHSA-gxh2-6vvc-rrgp
https://grafana.com/security/security-advisories/cve-2023-3128/
https://security.netapp.com/advisory/ntap-20230714-0004/

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