{"id":"CVE-2026-30242","aliases":["GHSA-fpx8-73gf-7x73"],"url":"https://o3.security/vulnerability/CVE-2026-30242","summary":"Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer","details":"### Summary\nThe webhook URL validation in `plane/app/serializers/webhook.py` only checks `ip.is_loopback`, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (`10.x.x.x`, `172.16.x.x`, `192.168.x.x`, `169.254.169.254`, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back.\n\n### Impact\n- **Cloud metadata exfiltration**: Access AWS/GCP/Azure instance metadata (IAM credentials, tokens)\n- **Internal service scanning**: Probe internal network services not exposed to the internet\n- **Data exfiltration via response logs**: Full response body from internal services is stored and returned to the attacker through the webhook logs API\n- Bypass vectors: `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`, `169.254.0.0/16`, `0.0.0.0`, `::ffff:` mapped addresses","published":"2026-03-06T21:19:24.386Z","modified":"2026-08-12T03:51:17.809224567Z","cvss":{"score":8.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"plane","fixedVersion":"1.2.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/makeplane/plane/releases/tag/v1.2.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30242.json"},{"type":"ADVISORY","url":"https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30242"},{"type":"PACKAGE","url":"https://github.com/makeplane/plane"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.809224567Z"}}