CVE-2026-12704

Grafana Enterprise: Grafana Enterprise: SAML assertion replay via skipped InResponseTo validation

Loading…

Severity

Moderate

Red Hat Product Security

6.8

CVSS 3.1

Review impact separately from score.

Published · September 2, 2026

Updated · September 4, 2026

Description

On Grafana Enterprise instances with the optional IdP-initiated SAML single sign-on enabled (allow_idp_initiated = true, disabled by default), Grafana did not fully validate the InResponseTo field of SAML responses. An attacker who obtained a valid, signed SAML assertion for a user could replay it within its short validity window to obtain an authenticated session as that user.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE-294 · Authentication Bypass by Capture-replay