High severity · published Oct 5, 2026
CVE-2026-104973
Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery
7.6
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PL
plane · makeplane
< 1.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104973
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104973
x_refsource_CONFIRM
https://github.com/makeplane/plane/security/advisories/GHSA-whh3-5g95-4qhc
x_refsource_MISC
https://github.com/makeplane/plane/pull/9163
x_refsource_MISC
https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615
x_refsource_MISC
https://github.com/makeplane/plane/releases/tag/v1.4.0
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