6.8

CVE-2026-12704: grafana grafana enterprise Authentication Bypass by Capture-replay

CVSS: 6.8v3.1MediumAwaiting analysis
AliasesCGA-3cm8-x4q8-j2gqCGA-3cmh-9m9g-798vCGA-3j5g-xvmx-mgrf
Published 02-09-2026Last modified 03-09-2026
Open JSON

Vulnerability summary

CVE-2026-12704 is a medium (CVSS 6.8) Authentication Bypass by Capture-replay vulnerability in grafana grafana enterprise. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.6% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-09-2026
    PublishedVulnerability first disclosed.
  2. 03-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard13 products
  • grafana-11.6All versions (No fix recorded)
  • grafana-12.1All versions (No fix recorded)
  • grafana-12.2All versions (No fix recorded)
  • grafana-12.3All versions (No fix recorded)
  • grafana-12.4< 12.4.11-r0
Wolfi3 products
  • grafana-12.3All versions (No fix recorded)
  • grafana-12.4< 12.4.11-r0
  • grafana-13.0< 13.0.9-r0
Grafana1 product
  • grafana enterprise≥ 11.6.0, ≤ 11.6.17 | ≥ 12.2.0, ≤ 12.2.11 | ≥ 12.3.0, ≤ 12.3.11 | ≥ 12.4.0, ≤ 12.4.10 | ≥ 13.0.0, ≤ 13.0.7 | ≥ 13.1.0, ≤ 13.1.4 | 13.2.0

3 vendors · 17 products

References

1 links