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`.
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 |
Configurations
History
30 Mar 2026, 17:21
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.1 |
| CPE | cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:* | |
| First Time |
Openbao openbao
Openbao |
|
| References | () https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662 - Patch | |
| References | () https://github.com/openbao/openbao/pull/2709 - Issue Tracking, Patch | |
| References | () https://github.com/openbao/openbao/releases/tag/v2.5.2 - Product, Release Notes | |
| References | () https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59 - Vendor Advisory |
Information
Published : 2026-03-27 15:16
Updated : 2026-03-30 17:21
NVD link : CVE-2026-33758
Mitre link : CVE-2026-33758
CVE.ORG link : CVE-2026-33758
JSON object : View
Products Affected
openbao
- openbao