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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Grafana Grafana Enterprise unaffected
Version Status Constraints
11.6.0 affected ≤ 11.6.17
12.2.0 affected ≤ 12.2.11
12.3.0 affected ≤ 12.3.11
12.4.0 affected ≤ 12.4.10
13.0.0 affected ≤ 13.0.7
13.1.0 affected ≤ 13.1.4
13.2.0 affected ≤ 13.2.0

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://grafana.com/security/security-advisories/cve-2026-12704 cve-icon cve-icon
History

Wed, 02 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 02 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title CVE-2026-12704 CVE Record
Weaknesses CWE-294
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-09-02T18:13:12.022Z

Reserved: 2026-06-19T10:24:45.152Z

Link: CVE-2026-12704

cve-icon Vulnrichment

Updated: 2026-09-02T18:12:46.607Z

cve-icon NVD

Status : Received

Published: 2026-09-02T16:17:14.383

Modified: 2026-09-02T19:17:16.240

Link: CVE-2026-12704

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses