{"id":"CVE-2026-91240","kind":"vulnerability","aliases":["CVE-2026-91240"],"related":[],"title":"Oracle WebCenter Sites: unauthenticated HTTP flaw exposes critical data","description":"Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites).  Supported versions that are affected are 12.2.1.4.0 and  14.1.2.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Sites.  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Oracle WebCenter Sites accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).","summary":"Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0 contain a flaw that an unauthenticated remote attacker can reach over HTTP. A successful attack can read critical data stored in the product, with no integrity or availability impact listed.","severity":"medium","cvss":5.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["fusion-middleware","oracle","self-hosted","vendor","webcenter-sites"],"not_affected_if":["no-internet-exposure","other-versions"],"how_to_check":"- Check the installed WebCenter Sites version against `12.2.1.4.0` and `14.1.2.0.0`\n- Review the Oracle Critical Patch Update advisory for the exact patched build, which the sources do not name","fix":"- Apply the Oracle Critical Patch Update fix for WebCenter Sites; the fixed version is unknown from the sources\n- Restrict HTTP access to WebCenter Sites to trusted networks until patched","status":"open","published_at":"2026-10-20T22:20:24+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:08:17+00:00","updated_at":"2026-10-25T04:08:17+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:08:17Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update fix for WebCenter Sites; the fixed version is unknown from the sources\n- Restrict HTTP access to WebCenter Sites to trusted networks until patched","reach":"internet","title":"Oracle WebCenter Sites: unauthenticated HTTP flaw exposes critical data","impact":"medium","summary":"Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0 contain a flaw that an unauthenticated remote attacker can reach over HTTP. A successful attack can read critical data stored in the product, with no integrity or availability impact listed.","category":"vendor","nicknames":[],"who_cares":["oracle","webcenter-sites","fusion-middleware","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads critical data stored in WebCenter Sites","analyst_note":"Check the Oracle CPU advisory for the fixed build number and whether the flaw needs a specific configuration; source is https://nvd.nist.gov/vuln/detail/CVE-2026-91240","how_to_check":"- Check the installed WebCenter Sites version against `12.2.1.4.0` and `14.1.2.0.0`\n- Review the Oracle Critical Patch Update advisory for the exact patched build, which the sources do not name","needs_analyst":true,"not_affected_if":["other-versions","no-internet-exposure"],"who_is_affected":"Teams running Oracle WebCenter Sites 12.2.1.4.0 or 14.1.2.0.0 with HTTP reachable from a network an attacker can reach. The sources describe the attack as difficult to exploit, so exposure depends on reachability and configuration. Teams not running these versions can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000679,"input_tokens":3490,"output_tokens":661,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':11A,14A '-91240':12A,15A '/av':137C '12.2.1.4.0':30B,83C '14.1.2.0.0':32B,85C '3.1':127C,136C '5.9':130C 'access':95C,112C,118C,124C 'affect':81C 'allow':90C 'attack':40B,47B,92C,104C 'avail':60B 'base':128C 'complet':117C 'compon':74C 'compromis':99C 'confidenti':131C 'contain':33B 'critic':8A,50B,114C 'cve':10A,13A 'cvss':126C,133C,135C 'data':9A,51B,115C,125C 'difficult':86C 'exploit':88C 'expos':7A 'flaw':6A,35B 'fusion':17B,72C 'fusion-middlewar':16B 'h/i':143C 'h/pr':139C 'host':22B 'http':5A,44B,97C 'impact':61B,132C 'integr':58B 'list':62B 'middlewar':18B,73C 'n':145C 'n/a':144C 'n/ac':138C 'n/s':141C 'n/ui':140C 'network':94C 'oracl':1A,19B,27B,66C,71C,100C,121C 'product':55B,69C 'reach':42B 'read':49B 'remot':39B 'result':109C 'score':129C 'self':21B 'self-host':20B 'site':3A,26B,29B,68C,76C,102C,123C 'store':52B 'success':46B,103C 'support':77C 'u/c':142C 'unauthent':4A,38B,91C 'unauthor':111C 'vector':134C 'vendor':23B 'version':78C 'via':96C 'vulner':63C,89C,107C 'webcent':2A,25B,28B,67C,75C,101C,122C 'webcenter-sit':24B","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle WebCenter Sites 12.2.1.4.0 or 14.1.2.0.0 with HTTP reachable from a network an attacker can reach. The sources describe the attack as difficult to exploit, so exposure depends on reachability and configuration. Teams not running these versions can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:24+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91240","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91240","severity":null,"published_at":"2026-10-20T22:20:24+00:00","modified_at":"2026-10-21T18:44:40+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","fetched_at":"2026-10-23T22:29:00+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"}