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File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix

Type: advisorySources: OSV

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, a low-privileged authenticated user of filebrowser (with create + delete permissions in their own isolated scope) can silently destroy share-link records belonging to any other user — including the administrator — by performing a legitimate DELETE on a file in their own directory whose logical path happens to be a byte-prefix of another user's stored share.Link.Path. The file contents of the victim are not exposed, but the victim's share links are irrevocably wiped. This vulnerability is fixed in 2.63.6.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-54097
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 20:06 UTC · Revision 1

Source evidence

File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix

core-osv · Original source

Published 25 Jun 2026, 17:40 UTC

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, a low-privileged authenticated user of filebrowser (with create + delete permissions in their own isolated scope) can silently destroy share-link records belonging to any other user — including the administrator — by performing a legitimate DELETE on a file in their own directory whose logical path happens to be a byte-prefix of another user's stored share.Link.Path. The file contents of the victim are not exposed, but the victim's share links are irrevocably wiped. This vulnerability is fixed in 2.63.6.

osv:CVE-2026-54097
Complete source record
{
  "id": "8069677a1bce33ed228b0a9cf11dc2b3deb030c9664fbf1fe1e86eb9af248360",
  "url": "https://osv.dev/vulnerability/CVE-2026-54097",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix",
    "summary": "File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, a low-privileged authenticated user of filebrowser (with create + delete permissions in their own isolated scope) can silently destroy share-link records belonging to any other user — including the administrator — by performing a legitimate DELETE on a file in their own directory whose logical path happens to be a byte-prefix of another user's stored share.Link.Path. The file contents of the victim are not exposed, but the victim's share links are irrevocably wiped. This vulnerability is fixed in 2.63.6.",
    "evidence": "osv:CVE-2026-54097",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54097",
      "aliases": [
        "CVE-2026-54097",
        "GHSA-5ww9-jg6q-38r7",
        "GO-2026-5159"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/filebrowser/filebrowser",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "85b7d2762dda67b6158220991654c65b43739005"
                },
                {
                  "fixed": "0231b7ebdfbe77a6c54027d30c4856c3fd81ee4d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.63.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0231b7ebdfbe77a6c54027d30c4856c3fd81ee4d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "85b7d2762dda67b6158220991654c65b43739005"
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                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.63.6"
                  }
                ]
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54097.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.394439590Z",
      "provider": "osv",
      "references": [
        "https://github.com/filebrowser/filebrowser/releases/tag/v2.63.6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54097.json",
        "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5ww9-jg6q-38r7",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54097",
        "https://github.com/filebrowser/filebrowser/commit/0231b7ebdfbe77a6c54027d30c4856c3fd81ee4d"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54097.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54097",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489630,
  "published_at": "2026-06-25T17:40:18.235+00:00"
}