CVE-2026-104973

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-918

• https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615
• https://github.com/makeplane/plane/pull/9163
• https://github.com/makeplane/plane/releases/tag/v1.4.0
• https://github.com/makeplane/plane/security/advisories/GHSA-whh3-5g95-4qhc
• https://github.com/cthackers/adm-zip/security/advisories/GHSA-j5f4-cc29-5x44

Published

Oct 5, 2026

Last Modified

Oct 7, 2026

Status

Deferred

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