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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2026-15342

Plane contains a multi‑tenant authorization flaw in its asset‑management API that allows authenticated users from one workspace to access, delete, or duplicate assets belonging to another workspace by providing only the victim workspace slug and asset ID. The affected endpoints return presigned file URLs and enable destructive or duplicative actions without verifying that the requester is a member of the targeted workspace. This enables cross‑tenant data exposure, data deletion, and persistent exfiltration of files into an attacker‑controlled workspace.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-15342
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 09:45 UTC · Revision 1

Source evidence

CVE-2026-15342

core-osv · Original source

Published 21 Jul 2026, 16:42 UTC

Plane contains a multi‑tenant authorization flaw in its asset‑management API that allows authenticated users from one workspace to access, delete, or duplicate assets belonging to another workspace by providing only the victim workspace slug and asset ID. The affected endpoints return presigned file URLs and enable destructive or duplicative actions without verifying that the requester is a member of the targeted workspace. This enables cross‑tenant data exposure, data deletion, and persistent exfiltration of files into an attacker‑controlled workspace.

osv:CVE-2026-15342
Complete source record
{
  "id": "a5b698baa1fb06c306c7229ee4a48a71b5dc7356806344b753a0cc8f28f4053e",
  "url": "https://osv.dev/vulnerability/CVE-2026-15342",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-15342",
    "summary": "Plane contains a multi‑tenant authorization flaw in its asset‑management API that allows authenticated users from one workspace to access, delete, or duplicate assets belonging to another workspace by providing only the victim workspace slug and asset ID. The affected endpoints return presigned file URLs and enable destructive or duplicative actions without verifying that the requester is a member of the targeted workspace. This enables cross‑tenant data exposure, data deletion, and persistent exfiltration of files into an attacker‑controlled workspace.",
    "evidence": "osv:CVE-2026-15342",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-15342",
      "aliases": [
        "CVE-2026-15342"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/makeplane/plane",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "cf696d200d3e222390a01ba20e833eb11a5ed881"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.0",
            "v0.24.0",
            "v0.23.1",
            "v0.23.0",
            "v0.22-dev",
            "v0.21-dev",
            "v0.20-dev",
            "v0.19-dev",
            "v0.18-dev",
            "v0.17-dev",
            "v0.16-dev",
            "v0.15.4-dev",
            "v0.15.3-hotfix",
            "v0.15.2-dev",
            "v0.15.1-dev",
            "v0.15-dev",
            "v0.14.2-dev",
            "v0.14.1-dev",
            "v0.14-dev",
            "v0.13.2-dev",
            "v0.13.1-dev",
            "v0.13-dev",
            "v0.12.2-dev",
            "v0.12.1-dev",
            "v0.12-dev",
            "v0.11-dev",
            "v0.10-dev",
            "v0.9-dev",
            "v0.8-dev",
            "v0.7.1-dev",
            "v0.7-dev",
            "v0.6-dev",
            "v0.5-dev",
            "v0.4-dev",
            "v0.3.1-dev",
            "v0.1-dev"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15342.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.621313354Z",
      "provider": "osv",
      "references": [
        "https://kb.cert.org/vuls/id/762226",
        "https://www.kb.cert.org/vuls/id/762226",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15342.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-15342",
        "https://github.com/makeplane/plane"
      ],
      "provider_metadata": {
        "cna_assigner": "certcc",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15342.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-15342",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494288,
  "published_at": "2026-07-21T16:42:52.478+00:00"
}