{"id":"CVE-2026-116880","kind":"vulnerability","aliases":["CVE-2026-116880"],"related":[],"title":"Semantic MediaWiki: CSRF in SMWAdmin lets lured admins wipe semantic data","description":"Semantic MediaWiki from 3.0.0 before 7.3.1 contains a cross-site request forgery vulnerability in Special:SMWAdmin because it overwrites the wpEditToken with a freshly generated valid token. Attackers can lure an authenticated smw-admin user to a malicious page that triggers schema setup, entity-disposal, or job actions, causing semantic data loss and resource exhaustion.","summary":"Semantic MediaWiki versions from 3.0.0 before 7.3.1 overwrite the edit token on Special:SMWAdmin with a freshly generated valid one, which defeats the cross-site request forgery check. An attacker can lure a logged-in smw-admin user to a malicious page that triggers schema setup, entity disposal or job actions, causing semantic data loss and resource exhaustion.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mediawiki","package","self-hosted","semantic-mediawiki"],"not_affected_if":["default-config","no-smw-admin-users"],"how_to_check":"- Check the installed Semantic MediaWiki version on Special:Version or in `composer.lock` for `mediawiki/semantic-media-wiki`; versions from `3.0.0` up to but not including `7.3.1` are affected.\n- Confirm whether any users hold the smw-admin group on the wiki.","fix":"- Upgrade Semantic MediaWiki to `7.3.1` or later.\n- Until upgraded, restrict or remove the smw-admin group from accounts that do not need it.","status":"open","published_at":"2026-10-27T11:17:30+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","triaged_at":"2026-10-27T11:31:53+00:00","updated_at":"2026-10-27T11:31:53+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-27T11:31:53Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Semantic MediaWiki to `7.3.1` or later.\n- Until upgraded, restrict or remove the smw-admin group from accounts that do not need it.","reach":"internet","title":"Semantic MediaWiki: CSRF in SMWAdmin lets lured admins wipe semantic data","impact":"medium","summary":"Semantic MediaWiki versions from 3.0.0 before 7.3.1 overwrite the edit token on Special:SMWAdmin with a freshly generated valid one, which defeats the cross-site request forgery check. An attacker can lure a logged-in smw-admin user to a malicious page that triggers schema setup, entity disposal or job actions, causing semantic data loss and resource exhaustion.","category":"package","nicknames":[],"who_cares":["mediawiki","semantic-mediawiki","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Semantic data is deleted and background jobs exhaust server resources.","analyst_note":"","how_to_check":"- Check the installed Semantic MediaWiki version on Special:Version or in `composer.lock` for `mediawiki/semantic-media-wiki`; versions from `3.0.0` up to but not including `7.3.1` are affected.\n- Confirm whether any users hold the smw-admin group on the wiki.","needs_analyst":false,"not_affected_if":["default-config","no-smw-admin-users"],"who_is_affected":"Wikis running Semantic MediaWiki between 3.0.0 and 7.2.x that have users in the smw-admin group, since the attack needs a logged-in administrator to visit a malicious page. Sites without SMW or without smw-admin users are not exposed to this path.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000656,"input_tokens":3372,"output_tokens":638,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-116880':14A,17A '-2026':13A,16A '3.0.0':30B,90C '7.3.1':32B,92C 'action':79B,137C 'admin':8A,65B,122C 'attack':56B,115C 'authent':119C 'caus':80B,138C 'check':54B 'contain':93C 'cross':50B,96C 'cross-sit':49B,95C 'csrf':3A 'cve':12A,15A 'data':11A,82B,140C 'defeat':47B 'dispos':76B,134C 'edit':35B 'entiti':75B,133C 'entity-dispos':132C 'exhaust':86B,144C 'forgeri':53B,99C 'fresh':42B,111C 'generat':43B,112C 'host':22B 'job':78B,136C 'let':6A 'log':61B 'logged-in':60B 'loss':83B,141C 'lure':7A,58B,117C 'malici':69B,126C 'mediawiki':2A,18B,25B,27B,88C 'one':45B 'overwrit':33B,106C 'packag':19B 'page':70B,127C 'request':52B,98C 'resourc':85B,143C 'schema':73B,130C 'self':21B 'self-host':20B 'semant':1A,10A,24B,26B,81B,87C,139C 'semantic-mediawiki':23B 'setup':74B,131C 'site':51B,97C 'smw':64B,121C 'smw-admin':63B,120C 'smwadmin':5A,39B,103C 'special':38B,102C 'token':36B,114C 'trigger':72B,129C 'user':66B,123C 'valid':44B,113C 'version':28B 'vulner':100C 'wipe':9A 'wpedittoken':108C","nicknames":[],"mitigations":[],"who_affected":"Wikis running Semantic MediaWiki between 3.0.0 and 7.2.x that have users in the smw-admin group, since the attack needs a logged-in administrator to visit a malicious page. Sites without SMW or without smw-admin users are not exposed to this path.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T11:17:30+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/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-2026-116880","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116880","severity":null,"published_at":"2026-10-27T11:17:30+00:00","modified_at":"2026-10-27T11:17:30+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","fetched_at":"2026-10-27T11:31:27+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}