SAML assertion replay via skipped InResponseTo validation (Grafana Grafana Enterprise)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.29 % · percentile 22 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GRAFANA
- NVD status
- Awaiting Analysis
Description
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.
Weaknesses (CWE)
- CWE-294 — Authentication Bypass by Capture-replay
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | GRAFANA |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | NVD · security@grafana.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-70197
- GCVE · GCVE-0-2026-12704
Affected products
| Product | Versions |
|---|---|
| Grafana · Grafana Enterprise | affected 11.6.0 ≤ 11.6.17 ; affected 12.2.0 ≤ 12.2.11 ; affected 12.3.0 ≤ 12.3.11 ; affected 12.4.0 ≤ 12.4.10 ; affected 13.0.0 ≤ 13.0.7 ; affected 13.1.0 ≤ 13.1.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |