Vulnerability · Published Sep 2, 2026 · Assigned by GRAFANA

CVE-2026-12704SAML assertion replay via skipped InResponseTo validation

Medium 6.8

In plain English

A medium-severity security flaw in Grafana Enterprise from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.3%top 78.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.24	grafana	12.4.14-r0	ALPINE-CVE-2026-12704

Affected products (as reported)

Vendor	Product	Versions
Grafana	Grafana Enterprise	11.6.0 – through 11.6.1712.2.0 – through 12.2.1112.3.0 – through 12.3.1112.4.0 – through 12.4.1013.0.0 – through 13.0.713.1.0 – through 13.1.413.2.0 – through 13.2.0

Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References

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