OpenBaoGHSA-cpj3-3r2f-xj59
OpenBao has Reflected XSS in its OIDC authentication error message
CriticalCVE-2026-33758 · Published Mar 26, 2026 · updated Jul 27, 2026
### 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 versions
| Package | Affected | Fixed in |
|---|---|---|
| github.com/openbao/openbao Go | < 0.0.0-20260325133417-6e2b2dd84f0e | 0.0.0-20260325133417-6e2b2dd84f0e |
Details and references
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