CVE-2026-45808
OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL
Description
# Impact OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked or renewed by a user in another tenant via the legacy, undocumented `sys/revoke` and `sys/renew` endpoints. # Patch This will be addressed in v2.5.4.
How to fix CVE-2026-45808
To remediate CVE-2026-45808, upgrade the affected package to a fixed version below.
- Go/github.com/openbao/openbao—upgrade to 2.5.4 or later
Is CVE-2026-45808 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-45808.
Affected packages (1)
- from 0, < 2.5.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |