TI-2026-34119 Aliases CVE-2026-46405 GHSA-7j6w-vvw2-5f9c

OpenBao's Kerberos Auth Method Accumulates Unaccessible Tokens

LOW 31CWE-770Published 2026-08-07 · Updated 2026-08-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00617 49th percentileScored 2026-11-07

Fix Fixed openbao (openbao): 2.5.4github.com/openbao/openbao (Go): 2.5.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
openbao	openbao	before 2.5.4	2.5.4	Patch available	CNA
—	github.com/openbao/openbao (Go)	before 2.5.4	2.5.4	Patch available	GHSA-7j6w-vvw2-5f9c

openbao Vendoropenbao Affected before 2.5.4 Fixed in 2.5.4 Patch available CNA
github.com/openbao/openbao (Go) Vendor— Affected before 2.5.4 Fixed in 2.5.4 Patch available GHSA-7j6w-vvw2-5f9c

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:openbao:openbao::::::::	—	—	openbao

cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:* Versions — — ·openbao

Remediation

Fix · CNA openbao (openbao) Fixed in 2.5.4
Fix · GHSA-7j6w-vvw2-5f9c github.com/openbao/openbao (Go) Fixed in 2.5.4 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-46405
2026-10-03 Alias added: GHSA-7j6w-vvw2-5f9c

References

Other 5

TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
TI-2026-34075 OpenBao's Inline Auth Incorrectly Redacted Headers CVSS 4.0MEDIUM 5.4
TI-2026-40259 OpenBao: LDAPi ldaputil (wrong escape func) CVSS 3.1MEDIUM 6.8
TI-2026-40265 OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types CVSS 3.1MEDIUM 6.5
TI-2026-28381 OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) CVSS 3.1MEDIUM 6.5
TI-2026-45068 OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack CVSS 4.0CRITICAL 9.2

See all 48 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences