CVE-2026-115356 (CVSS 5.4)

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.

Is your site exposed to CVE-2026-115356?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.12%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-613 CWE-613

References

Other References

https://github.com/openbao/openbao/security/advisories/GHSA-gf3j-hm38-jhh5 https://www.vulncheck.com/advisories/openbao-before-2.6.4-and-2.7.0-before-2.7.1-kubernetes-auth-method-token-renewal-after-revocation

Frequently Asked Questions

What is CVE-2026-115356? +

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. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-115356? +

CVE-2026-115356 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-115356? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-40939

The Data Sharing Framework (DSF) implements a distributed process engine based on the BPMN 2.0 and FHIR R4 standards. Prior …

CVE-2026-46401

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions prior to 26.0.0 suffer from an improper session …

CVE-2025-42602

This vulnerability exists in Meon KYC solutions due to improper handling of access and refresh tokens in certain API endpoints …

CVE-2025-46344

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions starting from 4.0.1 and prior …

CVE-2025-0138

Web sessions in the web interface of Palo Alto Networks Prisma® Cloud Compute Edition do not expire when users are …

CVE-2025-4754

Insufficient Session Expiration vulnerability in ash-project ash_authentication_phoenix allows Session Hijacking. This vulnerability is associated with program files lib/ash_authentication_phoenix/controller.ex. This issue …

CVE-2026-115356