Vulnerability from bitnami_vulndb
Published
2026-09-25 12:28
Modified
2026-09-25 12:52
Summary
OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "openbao",
        "purl": "pkg:bitnami/openbao"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.5"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55774"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:openbao:openbao:*:*:*:*:*:go:*:*"
    ],
    "severity": "Low"
  },
  "details": "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.",
  "id": "BIT-openbao-2026-55774",
  "modified": "2026-09-25T12:52:12.177Z",
  "published": "2026-09-25T12:28:09.764Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/pull/3307"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/pull/3310"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/releases/tag/v2.5.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/releases/tag/v2.6.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55774"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} \u2014 incomplete fix of CVE-2026-45808"
}



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