SAML assertion replay via skipped InResponseTo validation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-12704
StatePUBLISHED
AssignerGRAFANA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-02 16:17:14 UTC
Updated2026-09-03 16:37:52 UTC
DescriptionWhen 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.

Risk And Classification

Primary CVSS: v3.1 6.8 MEDIUM from [email protected]

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

EPSS: 0.002730000 probability, percentile 0.194210000 (date 2026-09-07)

Problem Types: CWE-294 | CWE-294 CWE-294

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
3.1CNADECLARED6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grafana Grafana Enterprise affected 11.6.0 11.6.17 semver Not specified
CNA Grafana Grafana Enterprise affected 12.2.0 12.2.11 semver Not specified
CNA Grafana Grafana Enterprise affected 12.3.0 12.3.11 semver Not specified
CNA Grafana Grafana Enterprise affected 12.4.0 12.4.10 semver Not specified
CNA Grafana Grafana Enterprise affected 13.0.0 13.0.7 semver Not specified
CNA Grafana Grafana Enterprise affected 13.1.0 13.1.4 semver Not specified
CNA Grafana Grafana Enterprise affected 13.2.0 13.2.0 semver Not specified

References

ReferenceSourceLinkTags
grafana.com/security/security-advisories/cve-2026-12704 [email protected] grafana.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report