CVE-2026-105636

9.9 CRITICALpublic exploit available

Published 2026-10-05 · Updated 2026-10-07

AI risk analysis

Summary: The flaw allows an attacker to exploit a webhook to fetch internal resources by registering a malicious URL that redirects to an internal address, leading to potential data exfiltration.
Exploitability: Exploitation is moderately hard as it requires the attacker to control a public endpoint and the ability to create a workspace. Precondition is the existence of a vulnerable Plane version prior to 1.4.0.
Blast radius: If exploited, the attacker can retrieve sensitive internal data, impacting the confidentiality of the organization’s resources.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Plane version 1.4.0 or later.

webdata-exfiltrationinternal-resource-fetch

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-918

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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