CVE-2026-46405 Details
Description
OpenBao is an open source identity-based secrets management system. Prior to version 2.5.4, in OpenBao's Kerberos auth method on the `GET` handler, or when an `Authorization: Negotiate` header is supplied, the response is includes a `logical.Auth` object in addition to an error message. This results in tokens being created with only the default policy, default TTL, and no entity information, which are hidden by the returned error message. No access to these tokens by the caller occurs and the authentication token is not ever made accessible outside of `sys/raw`. This is fixed in OpenBao v2.5.4. As a workaround, users may set a rate limit quota to limit the creation of these paths. As the path is unauthenticated, it isn't possible to deny access to it.
A vulnerability exists in OpenBao's Kerberos authentication method prior to version 2.5.4. When the 'GET' handler is used or an 'Authorization: Negotiate' header is included, the response contains a 'logical.Auth' object along with an error message. This combination leads to the creation of tokens that only have the default policy, default time-to-live, and no entity information, all of which are obscured by the error message. Although these tokens are not accessible to the caller and the authentication token is never available outside of 'sys/raw', the issue could result in unnecessary storage usage.
Users can upgrade to OpenBao version 2.5.4, where this vulnerability has been fixed. Instructions for downloading this version are available on the OpenBao GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 7, 2026CISA-ADP
Assessed Aug 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/openbao/openbao/commit/0d82e0a5a3b6a93e8087bcbaf0b11326c12d4f4d | [email protected] | Source CodeVendor |
| https://github.com/openbao/openbao/pull/3150 | [email protected] | Source CodeVendor |
| https://github.com/openbao/openbao/releases/tag/v2.5.4 | [email protected] | Release NotesVendor |
| https://github.com/openbao/openbao/security/advisories/GHSA-7j6w-vvw2-5f9c | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| OpenBao | <= 2.5.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 13, 2026 | CVE Modified | CISA-ADP |
| Aug 7, 2026 | New CVE Received | [email protected] |