Nextcloud: Information disclosure in Nextcloud Approval app via fileId parameter reveals workflow associations

{
  "id": "d72a00ab3d4f9c5e98057efbf0d9701e0179522669c7cf1b47c9f1ae95fa0bf1",
  "url": "https://osv.dev/vulnerability/CVE-2026-45277",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nextcloud: Information disclosure in Nextcloud Approval app via fileId parameter reveals workflow associations",
    "summary": "Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, authenticated users can check if arbitrary files are associated with specific approval workflows where they can request approval. This issue has been patched in version 2.7.2.",
    "evidence": "osv:CVE-2026-45277",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-45277",
      "aliases": [
        "CVE-2026-45277",
        "GHSA-h7gm-vgxr-9hcw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/approval",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1f41f41748dadf28b0da388110ee9da30b1dbf7b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.7.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:approval:*:*:*:*:*:nextcloud:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.7.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.7.1",
            "v2.7.0",
            "v2.6.0",
            "v2.5.0",
            "v2.4.0",
            "v2.3.0",
            "v2.2.0",
            "v2.1.0",
            "v2.0.0",
            "v1.3.0",
            "v1.1.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.14",
            "v1.0.13",
            "v1.0.12",
            "v1.0.11",
            "v1.0.10",
            "v1.0.10-3-nightly",
            "v1.0.10-2-nightly",
            "v1.0.9",
            "v1.0.8",
            "v1.0.8-1-nightly",
            "v1.0.7",
            "v1.0.7-4-nightly",
            "v1.0.7-3-nightly",
            "v1.0.7-2-nightly",
            "v1.0.7-1-nightly",
            "v1.0.6",
            "v1.0.5-6-nightly",
            "v1.0.5-5-nightly",
            "v1.0.5-4-nightly",
            "v1.0.5-3-nightly",
            "v1.0.5-2-nightly",
            "v1.0.5-1-nightly",
            "v1.0.4",
            "v1.0.4-1-nightly",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.0.9",
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.4-2-nightly",
            "v0.0.4-1-nightly",
            "v0.0.3-5-nightly",
            "v0.0.3-4-nightly",
            "v0.0.3-3-nightly",
            "v0.0.3-2-nightly"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45277.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.818097422Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/3475210",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45277.json",
        "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7gm-vgxr-9hcw",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45277",
        "https://github.com/nextcloud/approval/pull/356"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45277.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45277",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496688,
  "published_at": "2026-06-01T16:51:34.087+00:00"
}