Auth bypass in Openbao
CVE-2026-115366
OpenBao from 2.3.0 before 2.6.3 contains an improper authorization vulnerability that allows privileged child-namespace tokens to modify plugin registrations because /v1/sys/plugins/catalog/* is not restricted to the root namespace. Attackers can remove existing registrations, create invalid ones, or register installed plugins through a child namespace's sys/ mount, causing denial of service.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/openbao/openbao/security/advisories/GHSA-cg72-x35g-xfp8 (vendor-advisory)
- www.vulncheck.com/advisories/openbao-2.3.0-before-2.6.3-missing-root-namespace-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-115366?
- CVE-2026-115366 is a low-severity vulnerability in Openbao, classified under Incorrect Authorization. CVSS score: 2.6/10. Published 2026-10-22.
- How severe is CVE-2026-115366?
- Low severity. CVSS v3 base score is 2.6 out of 10.