{"id":"CVE-2026-91406","kind":"vulnerability","aliases":["CVE-2026-91406"],"related":[],"title":"Oracle Outside In PDF Export SDK: unauthenticated flaw allows full takeover","description":"Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In PDF Export SDK).   The supported version that is affected is 8.5.8. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).","summary":"Oracle Outside In Technology's PDF Export SDK, part of Oracle Fusion Middleware, has a flaw that a remote unauthenticated attacker can reach over HTTP. Successful exploitation requires a user to interact with the attack, and the attacker can then take over the component with high confidentiality, integrity and availability impact.","severity":"high","cvss":7.5,"epss":0.00361,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["fusion-middleware","oracle","outside-in","package","pdf-export"],"not_affected_if":["not-using-outside-in"],"how_to_check":"- Check whether the Oracle Outside In PDF Export SDK is installed in your applications or Fusion Middleware deployments\n- Confirm the version in use: the affected supported version is `8.5.8`\n- unknown for any other exact check the sources do not give","fix":"- Move Oracle Outside In Technology off the affected version `8.5.8` to a patched release from Oracle's security advisory\n- unknown for the exact patched version number, which the sources do not give","status":"open","published_at":"2026-10-20T22:20:43+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T03:18:25+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:18:25Z","model":"claude-haiku-5-5","output":{"fix":"- Move Oracle Outside In Technology off the affected version `8.5.8` to a patched release from Oracle's security advisory\n- unknown for the exact patched version number, which the sources do not give","reach":"internet","title":"Oracle Outside In PDF Export SDK: unauthenticated flaw allows full takeover","impact":"high","summary":"Oracle Outside In Technology's PDF Export SDK, part of Oracle Fusion Middleware, has a flaw that a remote unauthenticated attacker can reach over HTTP. Successful exploitation requires a user to interact with the attack, and the attacker can then take over the component with high confidentiality, integrity and availability impact.","category":"package","nicknames":[],"who_cares":["oracle","fusion-middleware","outside-in","pdf-export"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker takes over the component, affecting confidentiality, integrity and availability","analyst_note":"Check Oracle's Critical Patch Update advisory for the patched version and the exact preconditions, since the sources give only the CVSS vector and affected version 8.5.8.","how_to_check":"- Check whether the Oracle Outside In PDF Export SDK is installed in your applications or Fusion Middleware deployments\n- Confirm the version in use: the affected supported version is `8.5.8`\n- unknown for any other exact check the sources do not give","needs_analyst":true,"not_affected_if":["not-using-outside-in"],"who_is_affected":"Teams that run Oracle Fusion Middleware with the Outside In PDF Export SDK, especially where HTTP-facing services convert or export PDFs. The sources say the attack is difficult and needs a user to interact, so exposed services that process untrusted documents are the priority. Teams without Oracle Outside In in their stack can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000684,"input_tokens":3484,"output_tokens":671,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-91406':14A,17A '/av':164C '3.1':151C,163C '7.5':154C '8.5.8':105C 'access':115C 'affect':103C 'allow':9A,110C 'attack':49B,63B,66B,112C,125C,135C,137C 'avail':78B,158C 'base':152C 'compon':72B,92C 'compromis':119C 'confidenti':75B,155C 'cve':12A,15A 'cvss':150C,160C,162C 'difficult':106C 'exploit':55B,108C 'export':5A,28B,35B,96C 'flaw':8A,44B 'full':10A 'fusion':19B,40B,90C 'fusion-middlewar':18B 'h':172C 'h/a':171C 'h/i':170C 'h/pr':166C 'high':74B 'http':53B,117C 'human':127C 'impact':79B,159C 'integr':76B,156C 'interact':60B,128C 'middlewar':20B,41B,91C 'n/ac':165C 'n/ui':167C 'network':114C 'oracl':1A,21B,29B,39B,83C,89C,120C,146C 'outsid':2A,23B,30B,84C,93C,121C,147C 'outside-in':22B 'packag':25B 'part':37B 'pdf':4A,27B,34B,95C 'pdf-export':26B 'person':131C 'product':87C 'r/s':168C 'reach':51B 'remot':47B 'requir':56B,126C 'result':142C 'score':153C 'sdk':6A,36B,97C 'success':54B,124C,136C 'support':99C 'take':69B 'takeov':11A,144C 'technolog':32B,86C,123C,149C 'u/c':169C 'unauthent':7A,48B,111C 'user':58B 'vector':161C 'version':100C 'via':116C 'vulner':80C,109C,140C","nicknames":[],"mitigations":[],"who_affected":"Teams that run Oracle Fusion Middleware with the Outside In PDF Export SDK, especially where HTTP-facing services convert or export PDFs. The sources say the attack is difficult and needs a user to interact, so exposed services that process untrusted documents are the priority. Teams without Oracle Outside In in their stack can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:43+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91406","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91406","severity":null,"published_at":"2026-10-20T22:20:43+00:00","modified_at":"2026-10-23T20:17:29+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","fetched_at":"2026-10-23T22:29:00+00:00","note":null},{"source":"epss","external_id":"CVE-2026-91406","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91406","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-25T12:38:52+00:00","fetched_at":"2026-10-25T12:38:52+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"}