CVE-2026-33758

6.1 MEDIUM
Published: March 27, 2026 Modified: March 30, 2026
View on NVD

Description

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`.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/openbao/openbao/pull/2709
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/openbao/openbao/releases/tag/v2.5.2
Source: security-advisories@github.com
Product Release Notes
https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59
Source: security-advisories@github.com
Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.1%
31th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

openbao