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TI-2026-26136 Aliases CVE-2026-33757GHSA-7q7g-x6vg-xpc3

OpenBao lacks user confirmation for OIDC direct callback mode

Priority MEDIUM 43CWE-384Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-384.

Summary

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for user confirmation when logging in via JWT/OIDC and a role with `callback_mode` set to `direct`. This allows an attacker to start an authentication request and perform "remote phishing" by having the victim visit the URL and automatically log-in to the session of the attacker. Despite being based on the authorization code flow, the `direct` mode calls back directly to the API and allows an attacker to poll for an OpenBao token until it is issued. Version 2.5.2 includes an additional confirmation screen for `direct` type logins that requires manual user interaction in order to finish the authentication. This issue can be worked around either by removing any roles with `callback_mode=direct` or enforcing confirmation for every session on the token issuer side for the Client ID used by OpenBao.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00418 36th percentileScored 2026-11-07
Fix Fixed openbao (openbao): 2.5.2github.com/openbao/openbao (Go): 0.0.0-20260325142553-e32103951925

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
openbaoopenbaobefore 2.5.22.5.2Patch availableCNA
—github.com/openbao/openbao (Go)before 0.0.0-20260325142553-e321039519250.0.0-20260325142553-e32103951925Patch availableGHSA-7q7g-x6vg-xpc3
  • openbao Vendoropenbao Affected before 2.5.2 Fixed in 2.5.2 Patch available CNA
  • github.com/openbao/openbao (Go) Vendor— Affected before 0.0.0-20260325142553-e32103951925 Fixed in 0.0.0-20260325142553-e32103951925 Patch available GHSA-7q7g-x6vg-xpc3

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*before 2.5.2Vulnerableopenbao
  • cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:* Versions before 2.5.2 Vulnerable ·openbao

Remediation

  • Fix · CNA openbao (openbao) Fixed in 2.5.2
  • Fix · GHSA-7q7g-x6vg-xpc3 github.com/openbao/openbao (Go) Fixed in 0.0.0-20260325142553-e32103951925 Advisory →

Vendor assessments

Red Hat

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

Not affected: 1 product
  • Cryostat 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33757
  2. 2026-10-03 Alias added: GHSA-7q7g-x6vg-xpc3

References

Patch 1

Advisory 2

Other 2

  • 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-2026-26137 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
  • TI-2024-07039 Vault SSH Secrets Engine Configuration Did Not Restrict Valid Principals By Default CVSS 3.1HIGH 8.8
See all 24 →

Sources

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