What is GHSA-cpj3-3r2f-xj59?

GHSA-cpj3-3r2f-xj59 is a security advisory published by GitHub Security Advisories with Critical severity. OpenBao has Reflected XSS in its OIDC authentication error message

Which CVE IDs does GHSA-cpj3-3r2f-xj59 cover?

GHSA-cpj3-3r2f-xj59 covers the following CVE IDs: CVE-2026-33758. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-cpj3-3r2f-xj59?

GHSA-cpj3-3r2f-xj59 affects 1 product, including: go/github.com/openbao/openbao:\u003c 0.0.0-20260325133417-6e2b2dd84f0e.

GHSA-cpj3-3r2f-xj59Critical

OpenBao has Reflected XSS in its OIDC authentication error message

Vendor

GitHub Security Advisories

Published

March 26, 2026

Last Modified

March 27, 2026

🔗 CVE IDs covered (1)

CVE-2026-33758 →

📋 Description

Impact

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.

Patches

The error_description parameter has been replaced with a static error message in v2.5.2

Workarounds

The vulnerability can be mitigated by removing any roles with callback_mode set to direct.

🎯 Affected products1

go/github.com/openbao/openbao:< 0.0.0-20260325133417-6e2b2dd84f0e

🔗 References (6)

https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59
https://github.com/openbao/openbao/pull/2709
https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662
https://github.com/openbao/openbao/releases/tag/v2.5.2
https://nvd.nist.gov/vuln/detail/CVE-2026-33758
https://github.com/advisories/GHSA-cpj3-3r2f-xj59