Makeplane Plane up to 1.3.x Webhook Delivery Task webhook_task.py requests.post server-side request forgery

Summaryinfo

A vulnerability classified as critical was found in Makeplane Plane up to 1.3.x. This issue affects the function requests.post of the file apps/api/plane/bgtasks/webhook_task.py of the component Webhook Delivery Task. Such manipulation leads to server-side request forgery. This vulnerability is traded as CVE-2026-105636. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Makeplane Plane up to 1.3.x. Affected by this issue is the function requests.post of the file apps/api/plane/bgtasks/webhook_task.py of the component Webhook Delivery Task. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Plane is an open-source project management tool. Prior to 1.4.0, the webhook delivery task in apps/api/plane/bgtasks/webhook_task.py calls requests.post() without allow_redirects=False and does not validate redirect targets. validate_url() blocks private, loopback, link-local, and reserved addresses in the original webhook URL, but the final URL reached after one or more redirects is not checked. A user who can create a workspace can register a webhook pointing to an attacker-controlled public endpoint that returns a 302 redirect to an internal address. The Plane worker then fetches internal resources, including cloud metadata, and stores the response body in webhook_logs, where the attacker can retrieve it through the workspace webhook-logs API. This issue is fixed in 1.4.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-105636 since 10/05/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit.

Upgrading to version 1.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• Makeplane

Name

• Plane

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

• Product: https://github.com/makeplane/plane/

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