{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.4.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "04622ce1188c4680951f0001e35efb342fe51615"
            },
            {
              "fixed": "917b23a6c16d93fc00cef67900eff2755e8b13f7"
            }
          ],
          "repo": "https://github.com/makeplane/plane",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mq87-52pf-hm3h"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105636.json"
  },
  "details": "Plane is an open-source project management tool. Prior to 1.4.0, the webhook delivery task in apps/api/plane/bgtasks/webhook_task.py calls requests.post() without allow_redirects=False and does not validate redirect targets. validate_url() blocks private, loopback, link-local, and reserved addresses in the original webhook URL, but the final URL reached after one or more redirects is not checked. A user who can create a workspace can register a webhook pointing to an attacker-controlled public endpoint that returns a 302 redirect to an internal address. The Plane worker then fetches internal resources, including cloud metadata, and stores the response body in webhook_logs, where the attacker can retrieve it through the workspace webhook-logs API. This issue is fixed in 1.4.0.",
  "id": "CVE-2026-105636",
  "modified": "2026-10-07T02:31:10.578427752Z",
  "published": "2026-10-05T18:02:53.127Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/makeplane/plane/releases/tag/v1.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105636.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105636"
    },
    {
      "type": "FIX",
      "url": "https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615"
    },
    {
      "type": "FIX",
      "url": "https://github.com/makeplane/plane/pull/9163"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)"
}