{"id":"CVE-2026-105636","title":"Plane is an open-source project management tool","summary":"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…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-918"],"vendor":"makeplane","product":"plane","affected":["plane < 1.4.0"],"published":"2026-10-05","updated":"2026-10-07","sourceUpdated":"2026-10-07T22:17:02.053","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105636","references":[{"url":"https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/pull/9163","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-07T21:39:13.833798Z"},"epss":0.00427,"epssPercentile":0.36817,"ingestedAt":"2026-10-05T18:29:11.217Z","slug":"CVE-2026-105636","body":"## Overview\n\nPlane 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":67,"depthScoreParts":{"impact":54.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":217813,"id":"CVE-2026-105636","ts":1791410369566,"field":"exploit_available","old":"false","new":"true"}]}