{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.5.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9ba1413d793223cca67db12434093a2f25fdc540"
            },
            {
              "fixed": "b20b999dd4044d7b419a5472d8fe08407828be37"
            },
            {
              "fixed": "028992583c693c4de6350b8aa52ff85e30375a99"
            },
            {
              "fixed": "03e3a243b6f07d17c60ce0a182adee7cf4c424eb"
            }
          ],
          "repo": "https://github.com/openbao/openbao",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-c36x-h252-g9x2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55774.json"
  },
  "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": "CVE-2026-55774",
  "modified": "2026-09-17T03:30:40.481053776Z",
  "published": "2026-09-15T15:42:03.157Z",
  "references": [
    {
      "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": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55774.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55774"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/pull/3307"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/pull/3310"
    }
  ],
  "schema_version": "1.9.0",
  "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808"
}