{"id":"CVE-2026-105636","title":"Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)","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","cvssSource":"cna","cwe":["CWE-918"],"vendor":"makeplane","product":"plane","affected":["plane < 1.4.0"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T18:02:53.127Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105636","references":[{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","label":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h"},{"url":"https://github.com/makeplane/plane/pull/9163","label":"https://github.com/makeplane/plane/pull/9163"},{"url":"https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615","label":"https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615"},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","label":"https://github.com/makeplane/plane/releases/tag/v1.4.0"}],"tags":["cve.org"],"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## Affected\n\n- `plane < 1.4.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":54.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}