{"id":"CVE-2026-124426","kind":"vulnerability","aliases":["CVE-2026-124426"],"related":[],"title":"Craft CMS: unauthenticated GraphQL request reads content from out-of-scope sites","description":"Craft CMS from 5.0.0 before 5.11.2 contains an authorization bypass vulnerability that allows unauthenticated attackers to read content from sites outside a GraphQL schema's Sites scope. Attackers can send a POST request to /actions/graphql/api selecting the localized field without the siteId argument to disclose out-of-scope site content.","summary":"Craft CMS 5.0.0 before 5.11.2 fails to enforce a GraphQL schema's Sites scope when the localized field is requested without a siteId argument. An unauthenticated attacker can send a POST to /actions/graphql/api and read content from sites outside that scope.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["craft-cms","graphql","package","php","self-hosted"],"not_affected_if":["no-public-graphql","not-craft-5"],"how_to_check":"- Check the installed Craft CMS version in composer.lock or with `composer show craftcms/cms`\n- Look for a public GraphQL endpoint at /actions/graphql/api on the site","fix":"- Craft CMS: `5.11.2` or later","status":"open","published_at":"2026-11-08T14:18:08+00:00","first_seen_at":"2026-11-08T14:48:38+00:00","triaged_at":"2026-11-08T14:50:53+00:00","updated_at":"2026-11-08T14:50:53+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-08T14:50:53Z","model":"claude-haiku-5-5","output":{"fix":"- Craft CMS: `5.11.2` or later","reach":"internet","title":"Craft CMS: unauthenticated GraphQL request reads content from out-of-scope sites","impact":"low","summary":"Craft CMS 5.0.0 before 5.11.2 fails to enforce a GraphQL schema's Sites scope when the localized field is requested without a siteId argument. An unauthenticated attacker can send a POST to /actions/graphql/api and read content from sites outside that scope.","audience":"businesses","category":"package","nicknames":[],"who_cares":["craft-cms","php","graphql","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"unauthenticated users read content from other sites","analyst_note":"","how_to_check":"- Check the installed Craft CMS version in composer.lock or with `composer show craftcms/cms`\n- Look for a public GraphQL endpoint at /actions/graphql/api on the site","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["not-craft-5","no-public-graphql"],"who_is_affected":"Sites running Craft CMS 5.0.0 through 5.10.x that expose the GraphQL API at /actions/graphql/api are exposed. The attacker only needs to send a request without a siteId argument to read content from sites outside the schema's scope. Sites not running Craft 5, or without a public GraphQL endpoint, can skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000733,"input_tokens":4619,"output_tokens":542,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-124426':16A,19A '-2026':15A,18A '/actions/graphql/api':61B,104C '5.0.0':31B,73C '5.11.2':33B,75C 'allow':82C 'argument':52B,112C 'attack':55B,84C,97C 'author':78C 'bypass':79C 'cms':2A,22B,30B,71C 'contain':76C 'content':7A,64B,87C,120C 'craft':1A,21B,29B,70C 'craft-cm':20B 'cve':14A,17A 'disclos':114C 'enforc':36B 'fail':34B 'field':46B,108C 'graphql':4A,23B,38B,92C 'host':28B 'local':45B,107C 'out-of-scop':9A,115C 'outsid':67B,90C 'packag':24B 'php':25B 'post':59B,101C 'read':6A,63B,86C 'request':5A,48B,102C 'schema':39B,93C 'scope':12A,42B,69B,96C,118C 'select':105C 'self':27B 'self-host':26B 'send':57B,99C 'site':13A,41B,66B,89C,95C,119C 'siteid':51B,111C 'unauthent':3A,54B,83C 'vulner':80C 'without':49B,109C","nicknames":[],"mitigations":[],"who_affected":"Sites running Craft CMS 5.0.0 through 5.10.x that expose the GraphQL API at /actions/graphql/api are exposed. The attacker only needs to send a request without a siteId argument to read content from sites outside the schema's scope. Sites not running Craft 5, or without a public GraphQL endpoint, can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["craftcms","graphql","medium","package","php","selfhosted"],"campaign_type":null,"search_a":"'-124426':16A,19A '-2026':15A,18A 'cms':2A 'content':7A 'craft':1A 'cve':14A,17A 'graphql':4A 'out-of-scop':9A 'read':6A 'request':5A 'scope':12A 'site':13A 'unauthent':3A","search_b":"'/actions/graphql/api':61B '5.0.0':31B '5.11.2':33B 'argument':52B 'attack':55B 'cms':22B,30B 'content':64B 'craft':21B,29B 'craft-cm':20B 'enforc':36B 'fail':34B 'field':46B 'graphql':23B,38B 'host':28B 'local':45B 'outsid':67B 'packag':24B 'php':25B 'post':59B 'read':63B 'request':48B 'schema':39B 'scope':42B,69B 'self':27B 'self-host':26B 'send':57B 'site':41B,66B 'siteid':51B 'unauthent':54B 'without':49B","search_c":"'/actions/graphql/api':104C '5.0.0':73C '5.11.2':75C 'allow':82C 'argument':112C 'attack':84C,97C 'author':78C 'bypass':79C 'cms':71C 'contain':76C 'content':87C,120C 'craft':70C 'disclos':114C 'field':108C 'graphql':92C 'local':107C 'out-of-scop':115C 'outsid':90C 'post':101C 'read':86C 'request':102C 'schema':93C 'scope':96C,118C 'select':105C 'send':99C 'site':89C,95C,119C 'siteid':111C 'unauthent':83C 'vulner':80C 'without':109C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-10-23T09:04:46+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-2026-124426","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124426","severity":null,"published_at":"2026-11-08T14:18:08+00:00","modified_at":"2026-11-08T14:18:08+00:00","first_seen_at":"2026-11-08T14:48:38+00:00","fetched_at":"2026-11-08T14:48:38+00:00","note":null}],"documents":[{"id":102036,"url":"https://github.com/craftcms/cms/security/advisories/GHSA-mp59-9rf5-93wr","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-23T09:04:46+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":102037,"url":"https://www.vulncheck.com/advisories/craft-cms-before-5.11.2-graphql-sites-scope-bypass-via-localized-field","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"}