OCTOBER 6, 2026
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Case File

CVE-2026-105636

CRITICAL · CVSS 9.9 Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-10-05 · Last synced 2026-10-06

CyberRota Analysis

AI-Generated

The Plane project management tool is vulnerable to an improper handling of redirects in its webhook delivery functionality, allowing attackers to exploit this flaw by registering malicious webhooks that redirect to internal addresses. This can lead to unauthorized access to sensitive internal resources, including cloud metadata, which can be logged and accessed by the attacker. Organizations using versions prior to 1.4.0 should prioritize upgrading to the latest version to mitigate this critical risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-105636
Severity
CRITICAL
CVSS
9.9
EPSS
N/A

Original 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.