{"id":"CVE-2026-128052","kind":"vulnerability","aliases":["CVE-2026-128052"],"related":[],"title":"OpenMage magento-lts: template filter lets admins render restricted layout blocks","description":"OpenMage magento-lts before 20.19.0 and 21.0.0-beta1 before 21.0.0-beta3 contains an incorrect authorization vulnerability in the template filter's {{layout}} directive, which renders arbitrary layout handles without enforcing the admin/block whitelist that the {{block}} directive applies. Administrators with rights to edit email, CMS, widget or newsletter content can embed {{layout}} with arbitrary handles to render disallowed blocks and disclose limited information.","summary":"OpenMage magento-lts has an authorization gap in its template filter: the {{layout}} directive renders any layout handle without the admin/block whitelist that {{block}} enforces. An administrator who can edit email, CMS, widget or newsletter content can use it to render disallowed blocks and disclose limited information.","severity":"medium","cvss":5.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["magento-lts","openmage","package","php","self-hosted"],"not_affected_if":["fixed-version","no-untrusted-content-editors"],"how_to_check":"- Confirm the installed version with `composer show magento-lts/magento-lts` or the version in your OpenMage install\n- Check whether the installed version is below `20.19.0` on the 20.x line, or below `21.0.0-beta3` on the 21.0.0-beta line","fix":"- Move to `20.19.0` on the 20.x line\n- Move to `21.0.0-beta3` on the 21.0.0-beta line","status":"open","published_at":"2026-11-13T10:18:11+00:00","first_seen_at":"2026-11-13T10:47:33+00:00","triaged_at":"2026-11-13T10:58:35+00:00","updated_at":"2026-11-13T10:58:35+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-11-13T10:58:35Z","model":"claude-haiku-5-5","output":{"fix":"- Move to `20.19.0` on the 20.x line\n- Move to `21.0.0-beta3` on the 21.0.0-beta line","reach":"network","title":"OpenMage magento-lts: template filter lets admins render restricted layout blocks","impact":"low","summary":"OpenMage magento-lts has an authorization gap in its template filter: the {{layout}} directive renders any layout handle without the admin/block whitelist that {{block}} enforces. An administrator who can edit email, CMS, widget or newsletter content can use it to render disallowed blocks and disclose limited information.","audience":"businesses","category":"package","nicknames":[],"who_cares":["magento-lts","openmage","self-hosted","php"],"confidence":0.8,"fix_status":"available","needs_auth":"yes","worst_case":"Admin-level editors read limited blocks they should not see","analyst_note":"","how_to_check":"- Confirm the installed version with `composer show magento-lts/magento-lts` or the version in your OpenMage install\n- Check whether the installed version is below `20.19.0` on the 20.x line, or below `21.0.0-beta3` on the 21.0.0-beta line","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["fixed-version","no-untrusted-content-editors"],"who_is_affected":"Only installs that run OpenMage magento-lts in the affected ranges and have staff or accounts with rights to edit email, CMS, widget or newsletter content. The flaw needs an administrator-level account, so sites where only trusted admins hold those rights carry less risk. Installs already on the fixed versions are not affected.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000768,"input_tokens":4689,"output_tokens":599,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-128052':15A,18A '-2026':14A,17A '20.19.0':81C '21.0.0':83C,86C 'admin':8A 'admin/block':49B,108C 'administr':55B,115C 'appli':114C 'arbitrari':102C,130C 'author':34B,91C 'beta1':84C 'beta3':87C 'block':12A,52B,71B,112C,135C 'cms':60B,121C 'contain':88C 'content':64B,125C 'cve':13A,16A 'direct':42B,99C,113C 'disallow':70B,134C 'disclos':73B,137C 'edit':58B,119C 'email':59B,120C 'emb':127C 'enforc':53B,106C 'filter':6A,39B,96C 'gap':35B 'handl':46B,104C,131C 'host':27B 'incorrect':90C 'inform':75B,139C 'layout':11A,41B,45B,98C,103C,128C 'let':7A 'limit':74B,138C 'lts':4A,21B,31B,79C 'magento':3A,20B,30B,78C 'magento-lt':2A,19B,29B,77C 'newslett':63B,124C 'openmag':1A,22B,28B,76C 'packag':23B 'php':24B 'render':9A,43B,69B,101C,133C 'restrict':10A 'right':117C 'self':26B 'self-host':25B 'templat':5A,38B,95C 'use':66B 'vulner':92C 'whitelist':50B,109C 'widget':61B,122C 'without':47B,105C","nicknames":[],"mitigations":[],"who_affected":"Only installs that run OpenMage magento-lts in the affected ranges and have staff or accounts with rights to edit email, CMS, widget or newsletter content. The flaw needs an administrator-level account, so sites where only trusted admins hold those rights carry less risk. Installs already on the fixed versions are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["magentolts","medium","openmage","package","php","selfhosted"],"campaign_type":null,"search_a":"'-128052':15A,18A '-2026':14A,17A 'admin':8A 'block':12A 'cve':13A,16A 'filter':6A 'layout':11A 'let':7A 'lts':4A 'magento':3A 'magento-lt':2A 'openmag':1A 'render':9A 'restrict':10A 'templat':5A","search_b":"'admin/block':49B 'administr':55B 'author':34B 'block':52B,71B 'cms':60B 'content':64B 'direct':42B 'disallow':70B 'disclos':73B 'edit':58B 'email':59B 'enforc':53B 'filter':39B 'gap':35B 'handl':46B 'host':27B 'inform':75B 'layout':41B,45B 'limit':74B 'lts':21B,31B 'magento':20B,30B 'magento-lt':19B,29B 'newslett':63B 'openmag':22B,28B 'packag':23B 'php':24B 'render':43B,69B 'self':26B 'self-host':25B 'templat':38B 'use':66B 'whitelist':50B 'widget':61B 'without':47B","search_c":"'20.19.0':81C '21.0.0':83C,86C 'admin/block':108C 'administr':115C 'appli':114C 'arbitrari':102C,130C 'author':91C 'beta1':84C 'beta3':87C 'block':112C,135C 'cms':121C 'contain':88C 'content':125C 'direct':99C,113C 'disallow':134C 'disclos':137C 'edit':119C 'email':120C 'emb':127C 'enforc':106C 'filter':96C 'handl':104C,131C 'incorrect':90C 'inform':139C 'layout':98C,103C,128C 'limit':138C 'lts':79C 'magento':78C 'magento-lt':77C 'newslett':124C 'openmag':76C 'render':101C,133C 'right':117C 'templat':95C 'vulner':92C 'whitelist':109C 'widget':122C 'without':105C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-10-26T19:59:36+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/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-2026-128052","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128052","severity":null,"published_at":"2026-11-13T10:18:11+00:00","modified_at":"2026-11-13T10:18:11+00:00","first_seen_at":"2026-11-13T10:47:33+00:00","fetched_at":"2026-11-13T10:47:33+00:00","note":null}],"documents":[{"id":145418,"url":"https://github.com/OpenMage/magento-lts/commit/055ccb866c0fadfed2c27e8c0e9ebd10db0199df","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":145419,"url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-fqq6-76qg-2r96","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-26T19:59:36+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145420,"url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.19.0-block-whitelist-bypass-via-layout-directive","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"}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}