CVE-2026-12704Network attack vectorHinoki check available

Victim session takeover via SAML assertion replay

Published Sep 2, 2026 · Updated Sep 3, 2026

Authentication bypass in affected Grafana Enterprise releases allows remote attackers to gain a victim session via SAML assertion replay. The SAML response path skips InResponseTo validation whenever allow_idp_initiated is enabled, including for service-provider-initiated logins. Exploitation requires the nondefault setting and a captured valid signed assertion; successful replay creates a session as the asserted user.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in affected Grafana Enterprise releases allows remote attackers to gain a victim session via SAML assertion replay. The SAML response path skips InResponseTo validation whenever allow_idp_initiated is enabled, including for service-provider-initiated logins. Exploitation requires the nondefault setting and a captured valid signed assertion; successful replay creates a session as the asserted user.

The record

CVE
CVE-2026-12704
Published
Sep 2, 2026
Updated
Sep 3, 2026
Vendor
Grafana Labs
Product
Grafana Enterprise
Classifications
T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.6.0 <=11.6.17
  2. Affected versionversion=12.2.0 <=12.2.11
  3. Affected versionversion=12.3.0 <=12.3.11
  4. Affected versionversion=12.4.0 <=12.4.10
  5. Affected versionversion=13.0.0 <=13.0.7
  6. Affected versionversion=13.1.0 <=13.1.4
  7. Affected versionversion=13.2.0 <=13.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grafana Labs · Grafana Enterpriseversion=11.6.0 <=11.6.17; version=12.2.0 <=12.2.11; version=12.3.0 <=12.3.11; version=12.4.0 <=12.4.10; version=13.0.0 <=13.0.7; version=13.1.0 <=13.1.4; version=13.2.0 <=13.2.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1550Use Alternate Authentication Material

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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