MEDIUM 6.8 NVD

CVE-2026-12704

When SAML IdP-initiated login is enabled in Grafana Enterprise, the SAML library skips validation of the InResponseTo field on all SAML responses, including SP-

When SAML IdP-initiated login is enabled in Grafana Enterprise, the SAML library skips validation of the InResponseTo field on all SAML responses, including SP-initiated logins. This removes anti-replay protection, allowing an attacker who obtains a valid signed SAML assertion to replay it and gain a session as the victim user. Only instances with the allow_idp_initiated SAML setting enabled are affected; this setting is off by default and Grafana OSS is not affected.

References

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

Published: 2026-09-02 · Source: NVD · Feed updated: 2026-09-02

This medium severity vulnerability with a CVSS score of 6.8 was published on 2026-09-02 via NVD.

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