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OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808

Type: advisorySource: OSV1 source record

### Summary OpenBao users with access to the `sys/leases/revoke/:lease_id` endpoint in any namespace can revoke leases in any other namespace as long as the lease identifier is known to them, bypassing ACLs that should apply for cross-namespace revocations. ### Impact OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked by a user in another tenant. ### Patch This will be fixed in OpenBao v2.5.5. ### References This vulnerability is similar to but distinct from: - CVE-2026-45808 / GHSA-v8v8-cm84-m686 - CVE-2026-40264 / GHSA-p49j-v9wc-wg57

Announced Source revision 1
Original source ↗

GHSA-c36x-h252-g9x2

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:GHSA-c36x-h252-g9x2

github.com/openbao/openbao

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

github.com/openbao/openbao

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
0.0.0-20260617103932-b20b999dd404

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0.1.0"
          },
          {
            "last_affected": "2.5.4"
          }
        ]
      }
    ],
    "package": {
      "name": "github.com/openbao/openbao",
      "purl": "pkg:golang/github.com/openbao/openbao",
      "ecosystem": "Go"
    },
    "database_specific": {
      "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c36x-h252-g9x2/GHSA-c36x-h252-g9x2.json"
    }
  },
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.0.0-20260617103932-b20b999dd404"
          }
        ]
      }
    ],
    "package": {
      "name": "github.com/openbao/openbao",
      "purl": "pkg:golang/github.com/openbao/openbao",
      "ecosystem": "Go"
    },
    "database_specific": {
      "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c36x-h252-g9x2/GHSA-c36x-h252-g9x2.json"
    }
  }
]
Related CVEs
CVE-2026-55774

Source reference: /aliases

Publisher severity

low

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-55774 · Low

openbao

Event
#15260 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement