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TI-2026-76374 Aliases CVE-2026-103314GHSA-xxr5-h8gc-q63j

SAML response replay in StackRox issues multiple authentication tokens

Priority LOW 35CWE-294Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-294.

Summary

Red Hat Advanced Cluster Security for Kubernetes (RHACS) 4.10 and 4.11 are affected. The Central SAML authentication endpoint does not retain used SAML assertion or response identifiers, so it does not block replay (CWE-294). An attacker who obtains a valid, unexpired signed SAML response can submit it multiple times and receive distinct Central authentication tokens for the mapped identity.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS). The Central SAML authentication ACS endpoint does not retain used SAML assertion or response identifiers to prevent replay. An attacker who obtains a valid, unexpired signed SAML response can submit it multiple times and receive distinct Central authentication tokens for the mapped identity.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00405 35th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Advanced Cluster Security for Kubernetes 4.10—1793184257Patch availableCNA
Red HatRed Hat Advanced Cluster Security for Kubernetes 4.11—1792492060Patch availableCNA
  • Red Hat Advanced Cluster Security for Kubernetes 4.10 VendorRed Hat Affected — Fixed in 1793184257 Patch available CNA
  • Red Hat Advanced Cluster Security for Kubernetes 4.11 VendorRed Hat Affected — Fixed in 1792492060 Patch available CNA

CPE names CNA · 2

CPEVersionsRoleVendor
cpe:/a:redhat:advanced_cluster_security:4.10::el84.10—Red Hat
cpe:/a:redhat:advanced_cluster_security:4.11::el94.11—Red Hat
  • cpe:/a:redhat:advanced_cluster_security:4.10::el8 Versions 4.10 — ·Red Hat
  • cpe:/a:redhat:advanced_cluster_security:4.11::el9 Versions 4.11 — ·Red Hat

Remediation

Red Hat fixes RHACS 4.10 in version 1793184257 through RHSA-2026:92342, released 2026-10-29, and RHACS 4.11 in version 1792492060 through RHSA-2026:85932, released 2026-10-20.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Red Hat 2 advisories

  • RHSA-2026:92342 Released 2026-10-29 · Red Hat rating Critical
    RHACS 4.10.11 security and bug fix update
    • Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 registry.redhat.io/advanced-cluster-security/rhacs-central-db-rhel8, registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8
  • RHSA-2026:85932 Released 2026-10-20 · Red Hat rating Important
    RHACS 4.11.6 security and bug fix update
    • Red Hat Advanced Cluster Security for Kubernetes 4.11 registry.redhat.io/advanced-cluster-security/rhacs-main-rhel9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Advanced Cluster Security for Kubernetes 4.11 — RHSA-2026:92342

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-79000 Red Hat system CA store trusts weak eMudhra intermediate certificatesPriority LOW 32
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Advanced Cluster Security for Kubernetes 4.10Fixed RHSA-2026:92342
Red Hat Advanced Cluster Security for Kubernetes 4.11Fixed RHSA-2026:85932
Not affected: 2 products
  • Red Hat Advanced Cluster Security for Kubernetes 4.10
  • Red Hat Advanced Cluster Security for Kubernetes 4.11

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-103314
  2. 2026-10-19 CISA SSVC decision points changed
  3. 2026-10-19 Priority changed: MEDIUM → LOW
  4. 2026-10-19 Alias added: GHSA-xxr5-h8gc-q63j
  5. 2026-10-20 Fix available: RHSA-2026:85932 · Red Hat
  6. 2026-10-20 Fix available: Red Hat Advanced Cluster Security for Kubernetes 4.11 · Red Hat
  7. 2026-10-20 CVSS score added · Red Hat
  8. 2026-10-20 Fix available: advanced-cluster-security/rhacs-main-rhel9@1792492060 · CNA
  9. 2026-10-20 1 new reference · CNA
  10. 2026-10-29 Fix available: advanced-cluster-security/rhacs-main-rhel8@1793184257 · CNA
  11. 2026-10-29 1 new reference · CNA
  12. 2026-10-30 Fix available: RHSA-2026:92342 · Red Hat
  13. 2026-10-30 Fix available: Red Hat Advanced Cluster Security for Kubernetes 4.10, Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4.11 · Red Hat
  14. 2026-10-31 Affected versions changed · CNA
  15. 2026-10-31 Fix available: Red Hat Advanced Cluster Security for Kubernetes 4.11 · Red Hat

References

Advisory 2

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences