{"schema":"threatline.record/2","record":{"id":"CVE-2026-105636","aliases":["GHSA-mq87-52pf-hm3h"],"summary":"Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)","details":"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.","categories":["Unclassified"],"product":"plane","vendor":"makeplane","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105636","source_modified_at":"2026-10-07T21:39:44.814Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"plane","vendor":"makeplane","versions":[{"status":"affected","version":"< 1.4.0"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","source_modified_at":"2026-10-05T18:02:21Z","fetched_at":"2026-10-23T22:01:05.715934Z","package":{"ecosystem":"other","name":"makeplane/plane"},"range":"<= 1.3.1"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","source_modified_at":"2026-10-05T18:02:21Z","fetched_at":"2026-10-23T22:01:05.715934Z","package":{"ecosystem":"other","name":"makeplane/plane"},"version":"1.4.0"}],"cvss":9.9,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.0035,"percentile":0.2739,"score_date":"2026-10-23"},"published_at":"2026-10-05T18:02:53.127Z","modified_at":"2026-10-07T21:39:44.814Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105636","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-07T21:39:44.814Z"},{"source":"GitHub Advisory Database","url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","fetched_at":"2026-10-23T22:01:05.715934Z","source_modified_at":"2026-10-05T18:02:21Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105636","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/makeplane/plane/security/advisories/GHSA-mq87-52pf-hm3h","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/pull/9163","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-10-07T21:39:13.833798Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T21:39:44.814Z","content_hash":"986269b6e3ac0abd7d16c2e9f1f1d8fe7fd79b2d273eb90e0db889e4a89a7b5b"}}