Read the docs
TI-2026-29058 Aliases CVE-2026-40264GHSA-p49j-v9wc-wg57

OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation

Priority LOW 11CWE-1259Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00301 22nd percentileScored 2026-11-07
Fix Fixed openbao (openbao): 2.5.3github.com/openbao/openbao (Go): 0.0.0-20260420162526-f58111d2ca54

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
openbaoopenbaobefore 2.5.32.5.3Patch availableCNA
—github.com/openbao/openbao (Go)before 0.0.0-20260420162526-f58111d2ca540.0.0-20260420162526-f58111d2ca54Patch availableGHSA-p49j-v9wc-wg57
  • openbao Vendoropenbao Affected before 2.5.3 Fixed in 2.5.3 Patch available CNA
  • github.com/openbao/openbao (Go) Vendor— Affected before 0.0.0-20260420162526-f58111d2ca54 Fixed in 0.0.0-20260420162526-f58111d2ca54 Patch available GHSA-p49j-v9wc-wg57

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*before 2.5.3Vulnerableopenbao
  • cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:* Versions before 2.5.3 Vulnerable ·openbao

Remediation

  • Fix · CNA openbao (openbao) Fixed in 2.5.3
  • Fix · GHSA-p49j-v9wc-wg57 github.com/openbao/openbao (Go) Fixed in 0.0.0-20260420162526-f58111d2ca54 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40264
  2. 2026-10-03 Alias added: GHSA-p49j-v9wc-wg57

References

Advisory 2

Other 4

  • TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
  • TI-2026-28381 OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) CVSS 3.1MEDIUM 6.5
  • TI-2026-26136 OpenBao lacks user confirmation for OIDC direct callback mode CVSS 3.1CRITICAL 9.6
  • TI-2026-26137 OpenBao has Reflected XSS in its OIDC authentication error message CVSS 4.0CRITICAL 9.4
  • TI-2025-34701 OpenBao: Privileged Operator May Execute Code on the Underlying Host CVSS 3.1CRITICAL 9.1
  • TI-2025-36685 OpenBao vulnerable to denial of service via malicious JSON request processing CVSS 3.1HIGH 7.5
See all 24 →

Sources

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