SB2026042150 - Fedora EPEL 8 update for openbao
Published: April 21, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2026-33757)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
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.