{"id":"CVE-2026-120489","kind":"vulnerability","aliases":["CVE-2026-120489"],"related":[],"title":"Outline: authenticated members can publish documents into private collections","description":"Outline before 1.12.0 contains an incorrect authorization vulnerability in authorizeDocumentPublish() that allows authenticated members to publish documents into private collections without write access. Attackers can detach a child document via documents.unpublish, retaining parentDocumentId, then call documents.update with a private collection UUID to inject phishing content.","summary":"Outline versions before 1.12.0 let a logged-in member publish documents into private collections they cannot write to. An attacker can use this to place phishing content inside a private collection.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["outline","package","self-hosted","wiki"],"not_affected_if":["already-on-1.12.0-or-later","no-untrusted-members"],"how_to_check":"- Check the installed Outline version (for example in the deployment's package or image tag) and compare it with `1.12.0`.\n- Confirm whether the instance allows members to create or publish documents at all.","fix":"- Move Outline to `1.12.0` or later.","status":"open","published_at":"2026-11-02T15:17:30+00:00","first_seen_at":"2026-11-02T15:24:04+00:00","triaged_at":"2026-11-02T15:26:26+00:00","updated_at":"2026-11-02T15:26:26+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-02T15:26:26Z","model":"claude-haiku-5-5","output":{"fix":"- Move Outline to `1.12.0` or later.","reach":"network","title":"Outline: authenticated members can publish documents into private collections","impact":"low","summary":"Outline versions before 1.12.0 let a logged-in member publish documents into private collections they cannot write to. An attacker can use this to place phishing content inside a private collection.","audience":"businesses","category":"package","nicknames":[],"who_cares":["outline","self-hosted","wiki"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"Attacker plants phishing content inside private team collections.","analyst_note":"","how_to_check":"- Check the installed Outline version (for example in the deployment's package or image tag) and compare it with `1.12.0`.\n- Confirm whether the instance allows members to create or publish documents at all.","plain_action":"","needs_analyst":false,"not_affected_if":["already-on-1.12.0-or-later","no-untrusted-members"],"who_is_affected":"Self-hosted or managed Outline instances running a version before 1.12.0 where authenticated members exist. The flaw is in the document publish authorization check, so the attacker needs a normal account, not an admin one. Instances already on 1.12.0 or later are not affected.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000656,"input_tokens":4209,"output_tokens":470,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-120489':12A,15A '-2026':11A,14A '1.12.0':25B,56C 'access':76C 'allow':65C 'attack':42B,77C 'authent':2A,66C 'author':60C 'authorizedocumentpublish':63C 'call':88C 'cannot':38B 'child':81C 'collect':9A,36B,53B,73C,93C 'contain':57C 'content':49B,98C 'cve':10A,13A 'detach':79C 'document':6A,33B,70C,82C 'documents.unpublish':84C 'documents.update':89C 'host':20B 'incorrect':59C 'inject':96C 'insid':50B 'let':26B 'log':29B 'logged-in':28B 'member':3A,31B,67C 'outlin':1A,16B,22B,54C 'packag':17B 'parentdocumentid':86C 'phish':48B,97C 'place':47B 'privat':8A,35B,52B,72C,92C 'publish':5A,32B,69C 'retain':85C 'self':19B 'self-host':18B 'use':44B 'uuid':94C 'version':23B 'via':83C 'vulner':61C 'wiki':21B 'without':74C 'write':39B,75C","nicknames":[],"mitigations":[],"who_affected":"Self-hosted or managed Outline instances running a version before 1.12.0 where authenticated members exist. The flaw is in the document publish authorization check, so the attacker needs a normal account, not an admin one. Instances already on 1.12.0 or later are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","outline","package","selfhosted","wiki"],"first_public_at":"2026-10-24T02:47:07+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-120489","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120489","severity":null,"published_at":"2026-11-02T15:17:30+00:00","modified_at":"2026-11-02T15:17:30+00:00","first_seen_at":"2026-11-02T15:24:04+00:00","fetched_at":"2026-11-02T15:24:04+00:00","note":null}],"documents":[{"id":52531,"url":"https://github.com/outline/outline/commit/d249b34e8e5fd465d542cad87190d411fdcbd5dc","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":52488,"url":"https://github.com/outline/outline/releases/tag/v1.12.0","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":52533,"url":"https://github.com/outline/outline/security/advisories/GHSA-h6ff-rw9x-5mq2","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-24T02:47:07+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":52534,"url":"https://www.vulncheck.com/advisories/outline-before-1.12.0-incorrect-authorization-via-authorizedocumentpublish-detached-draft","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}