CVE-2026-33758
Fixed in a distro release EPSS <1%CVSS 9.4
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`.
Products: openbao, Red Hat Cryostat 4
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/openbao/openbao | 0.0.0-20260325133417-6e2b2dd84f0e |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260326T203309-150000.1.155.2 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |
| openSUSE Tumbleweed | openbao | 2.5.2-1.1 |