CVE-2026-104973 — Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
makeplane / plane	affected < 1.4.0

CWE

CWE-918

References

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

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/cthackers/adm-zip/security/advisories/GHSA-j5f4-cc29-5x44