cve.bz

CVE-2026-33758

9.4 criticalEPSS 0.3%

Critical (9.4) in openbao openbao. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/openbao/openbao 0.0.0-20260325133417-6e2b2dd84f0e.

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`.

Severity

CVSS 4.0

9.4 critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS 3.1

6.1 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWEs
CWE-20, CWE-79, CWE-116
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-cpj3-3r2f-xj59Gogithub.com/openbao/openbao<0.0.0-20260325133417-6e2b2dd84f0e0.0.0-20260325133417-6e2b2dd84f0e
GO-2026-4862Gogithub.com/openbao/openbao<0.0.0-20260325133417-6e2b2dd84f0e0.0.0-20260325133417-6e2b2dd84f0e

References

Check your stackJSON