Vulnerability · Published Oct 22, 2026 · Assigned by VulnCheck

CVE-2026-115365OpenBao 2.3.0 before 2.6.3 Incorrect Authorization via Policy Cache Namespace Traversal

Medium 6.6

In plain English

A medium-severity incorrect authorization in openbao from openbao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.6Medium

Exploit odds (30 days)0.3%top 76.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OpenBao from 2.3.0 before 2.6.3 contains an incorrect authorization vulnerability in its ACL policy cache that allows tokens to reference policies from arbitrary namespaces using specially crafted policy names. Attackers holding such tokens can gain capabilities of cached policies in other namespaces, including the root namespace, to act across namespace boundaries.

Affected products (as reported)

Vendor	Product	Versions
openbao	openbao	2.3.0 – before 2.6.3

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-mjch-vcw3-hhmf) vendor-advisory
VulnCheck Advisory: OpenBao 2.3.0 before 2.6.3 Incorrect Authorization via Policy Cache Namespace Traversal third-party-advisory