CVE-2026-33758

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that have an OIDC/JWT authentication method enabled and a role with `callback_mode=direct` configured are vulnerable to XSS via the `error_description` parameter on the page for a failed authentication. This allows an attacker access to the token used in the Web UI by a victim. The `error_description` parameter has been replaced with a static error message in v2.5.2. The vulnerability can be mitigated by removing any roles with `callback_mode` set to `direct`.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662	Patch
https://github.com/openbao/openbao/pull/2709	Issue Tracking Patch
https://github.com/openbao/openbao/releases/tag/v2.5.2	Product Release Notes
https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-33758
https://bugzilla.redhat.com/show_bug.cgi?id=2452294
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33758.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-27 15:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-33758

Mitre link : CVE-2026-33758

CVE.ORG link : CVE-2026-33758

JSON object : View

Products Affected

openbao

openbao

CWE

CWE-20

Improper Input Validation

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-116

Improper Encoding or Escaping of Output

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