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Vulnerabilities

Vulnerability · CVE-2026-33758

OpenBao is an open source identity-based secrets management system.

Published Mar 27, 2026 · catalog updated Jul 15, 2026 · OpenBao is an open

Check if you run it

No confirmed exploitation is on record for CVE-2026-33758. EPSS is 0.45%. Act only if a listed version of OpenBao is an open is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (OpenBao is an open).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Advisory link
Affected products
cpe openbao/openbao

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 configured are vulnerable to XSS via the 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 parameter has been replaced with a static error message in v2.5.2. The vulnerability can be mitigated by removing any roles with set to .

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe openbao/openbaoversion unspecified

How to fix CVE-2026-33758

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33758. EPSS is 0.45%. Act only if a listed version of OpenBao is an open is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-116; CWE-20: Improper Input Validation; CWE-79: Cross-site Scripting (XSS). EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 27, 2026 · NIST NVD

    Detected

    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 configured are vulnerable to XSS via the 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 parameter has been replaced with a static erro

  2. Jul 15, 2026 · NIST NVD

    Updated

    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 configured are vulnerable to XSS via the 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 parameter has been replaced with a static erro

Sources

  • CVE.orgVulnerability recordCVE-2026-33758

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33758

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33758

    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 configured are vulnerable to XSS via the parameter on

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.