CVE-2026-55774Low· 2.1▾ SunlitOpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an OpenBao user with access to sys/leases/revoke/:lease_id in one namespace could revoke a lease in another namespace when the foreign lease_id was known…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 11.6 · 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
— → 2.1
0.4%
OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an OpenBao user with access to sys/leases/revoke/:lease_id in one namespace could revoke a lease in another namespace when the foreign lease_id was known, bypassing namespace ACL isolation. The affected lease lookup routing in vault/expiration.go allowed FetchLeaseInfo and loadEntry to resolve cached or stored lease data outside the request namespace, allowing a tenant that intentionally disclosed a lease identifier to have the lease and its underlying credential revoked by another tenant. 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 >= 0.1.0, <= 2.5.4github.com/openbao/openbao < 0.0.0-20260617103932-b20b999dd404Patched in:
github.com/openbao/openbao 0.0.0-20260617103932-b20b999dd404Source: https://github.com/advisories/GHSA-c36x-h252-g9x2
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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