CVE-2026-104973

HIGH 7.6

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

CVSS Score

7.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	makeplane
Product	plane
Published	Oct 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

makeplane / plane

< 1.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/makeplane/plane/security/advisories/GHSA-whh3-5g95-4qhc github.com: https://github.com/makeplane/plane/pull/9163 github.com: https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615 github.com: https://github.com/makeplane/plane/releases/tag/v1.4.0