SB2026042157 - Fedora 42 update for openbao
Published: April 21, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2026-33757)
The vulnerability allows a remote attacker to obtain an OpenBao token associated with the attacker's session by tricking a victim into completing a login flow.
The vulnerability exists due to improper authentication flow control in the JWT/OIDC direct callback mode when handling authentication requests for roles configured with callback_mode set to direct. A remote attacker can start an authentication request and have the victim visit a crafted URL to obtain an OpenBao token associated with the attacker's session by tricking a victim into completing a login flow.
User interaction is required to visit the URL and complete the login flow.
2) Cross-site scripting (CVE-ID: CVE-2026-33758)
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to cross-site scripting in the OIDC authentication error message page when handling the error_description parameter for a failed authentication. A remote attacker can supply a crafted error_description parameter to disclose sensitive information.
Only installations with an OIDC/JWT authentication method enabled and a role configured with callback_mode=direct are vulnerable. User interaction is required.
Remediation
Install update from vendor's website.