Is CVE-2026-104973 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104973?

CVE-2026-104973 has a CVSS v3 severity of HIGH (7.6).

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CVE-2026-104973

Description

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.