CVE-2026-55775Low· 2.3▾ SunlitOpenBao is an open source identity-based secrets management system. Prior to 2.5.5, OpenBao users granted capabilities on /sys/namespaces/root within a non-root namespace could exploit special handling of the literal root path in namespa…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 12.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 2.3
0.4%
OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, OpenBao users granted capabilities on /sys/namespaces/root within a non-root namespace could exploit special handling of the literal root path in namespace canonicalization. The /sys/namespaces/* endpoint family can resolve its containing namespace through a path prefix or X-Vault-Namespace header. ACL checks occurred before root canonicalized to an empty path, causing /sys/namespaces/root to resolve to the system backend's containing namespace and allowing permitted lookups, deletion, locking, or custom metadata changes against that direct containing namespace. The root namespace and arbitrary unrelated namespaces are not affected, and available operations depend on the capabilities granted on the path and subpaths such as /api-lock. This issue is fixed in version 2.5.5.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/openbao/openbao < 0.0.0-20260617103935-d3c1cc64b1aegithub.com/openbao/openbao >= 0.1.0, <= 2.5.4Patched in:
github.com/openbao/openbao 0.0.0-20260617103935-d3c1cc64b1aeSource: https://github.com/advisories/GHSA-mwr2-wmgp-crj6
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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