CVE-2026-104973

Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery

7.6 High

Plane is an open-source project management tool. Prior to 1.4.0, the fix for CVE-2026-30242 validates webhook IP addresses only when the webhook is created in apps/api/plane/app/serializers/webhook.py. The delivery task in apps/api/plane/bgtasks/webhook_task.py performs a separate DNS resolution when sending the request and does not validate the resolved IP address, allowing DNS rebinding to bypass the SSRF protection. This issue is fixed in 1.4.0.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: Low
Availability: None

Exploit likelihood

0.33%Up 0.1 points since Oct 6, 2026

What each source reports

CVE List Score used 7.6

Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery

Record: CVE-2026-104973
CVSS 3.1: 7.6 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-918
Updated: 2026-11-02

EUVDEUVD-2026-92526 7.6

Record: EUVD-2026-92526
CVSS 3.1: 7.6 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Updated: 2026-11-02

NVD 7.6

Record: CVE-2026-104973
CVSS 3.1: 7.6 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-918
Updated: 2026-11-02

OSV 7.6

Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery

Record: CVE-2026-104973
CVSS 3.1: 7.6 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-918
Updated: 2026-11-02

Affected products

makeplane plane

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-104973 is a high vulnerability (CVSS 7.6) in Makeplane Plane, published October 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.