Medium 5.3Published Aug 7, 2026

CVE-2026-46405OpenBao's Kerberos Auth Method Accumulates Unaccessible Tokens

Updated under an hour ago (2026-10-19 07:00 UTC)

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Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openbao openbao openbao:openbao (from the name)	before 2.5.4	CNA record

References

https://github.com/openbao/openbao/security/advisories/GHSA-7j6w-vvw2-5f9cx-refsource-confirm
https://github.com/openbao/openbao/pull/3150x-refsource-misc
https://github.com/openbao/openbao/commit/0d82e0a5a3b6a93e8087bcbaf0b11326c12d4f4dx-refsource-misc
https://github.com/openbao/openbao/releases/tag/v2.5.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.