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CVE-2026-115356— OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Kubernetes Auth Method Token Renewal After Revocation

Quick assessment

Affected
openbao openbao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 OpenBao 2.6.4 之前以及 2.7.x 系列中 2.7.1 之前的版本中，当通过 Kubernetes 认证方法续期令牌时，系统不会验证最初用于认证的 Kubernetes Service Account 令牌是否仍然有效。已认证的攻击者可借此持续续期此类令牌，从而在 Kubernetes Service Account 被删除后仍保留访问权限。

CVSS 5.4 · Medium

Affected Version Matrix 4

VendorProduct Version RangeStatus
openbao openbao < 2.6.4 affected
2.6.4 unaffected
2.7.0< 2.7.1 affected
2.7.1 unaffected
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I. Basic Information for CVE-2026-115356

Vulnerability Information
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Vulnerability Title
OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Kubernetes Auth Method Token Renewal After Revocation
Source: CVE Program / CVE List V5
Vulnerability Description
OpenBao before 2.6.4 and 2.7.x before 2.7.1 does not verify, when renewing a token issued by the Kubernetes Auth method, that the service account token originally used to authenticate is still valid. An authenticated attacker can keep renewing such tokens to persist access after the Kubernetes service account has been deleted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
openbao openbao 0 ~ 2.6.4 -

II. Public POCs for CVE-2026-115356

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III. Intelligence Information for CVE-2026-115356

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Vendor Advisories for CVE-2026-115356 (2)

Same Patch Batch · openbao · 2026-10-22 · 12 CVEs total

CVE-2026-115365 6.6 MEDIUM OpenBao 2.3.0 before 2.6.3 Incorrect Authorization via Policy Cache Namespace Traversal
CVE-2026-115360 4.7 MEDIUM OpenBao before 2.6.3 Open Redirect via OIDC Identity Provider UI
CVE-2026-115361 4.1 MEDIUM OpenBao before 2.6.3 ACL Bypass via Dropped Templated Policy Denial
CVE-2026-115359 3.7 LOW OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Role-Based Rate Limit Quota Bypass via Request
CVE-2026-115363 3.3 LOW OpenBao 2.2.0 before 2.6.4 and 2.7.0 before 2.7.1 ACME EAB MAC Key Disclosure via Sanitize
CVE-2026-115366 2.6 LOW OpenBao 2.3.0 before 2.6.3 Missing Root Namespace Enforcement in Plugin Catalog APIs
CVE-2026-115369 2.2 LOW OpenBao 2.5.0 before 2.6.2 PKI allowed_ip_sans_cidr Bypass via CSR IP SANs
CVE-2026-115364 2.2 LOW OpenBao before 2.6.3 Missing Header Check on Agent/Proxy Quit Endpoints
CVE-2026-115357 2.2 LOW OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Improper Audit Logging of Root Generation and
CVE-2026-115362 2.2 LOW OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Expired AppRole SecretID Authentication Bypass
CVE-2026-115358 2.0 LOW OpenBao before 2.6.3 Sensitive Data Leak in Audit Log via Malformed Parameters

IV. Related Vulnerabilities

Same product: openbao
Same vendor: openbao
Same weakness: CWE-613

V. Comments for CVE-2026-115356

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