{"id":"CVE-2026-91405","kind":"vulnerability","aliases":["CVE-2026-91405"],"related":[],"title":"Oracle Outside In PDF Export SDK: unauthenticated takeover over HTTP","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":"The Oracle Outside In PDF Export SDK, part of Oracle Fusion Middleware, has a flaw that a remote unauthenticated attacker can reach over HTTP. A successful attack, which needs a user to take an action, can take over the component and affect its confidentiality, integrity and availability.","severity":"high","cvss":7.5,"epss":0.00281,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["fusion-middleware","oracle","outside-in","package","self-hosted"],"not_affected_if":["no-outside-in-sdk"],"how_to_check":"- Check whether the Outside In PDF Export SDK is deployed, for example in Oracle Fusion Middleware installs, and note its version\n- Confirm the installed version against the affected release `8.5.8` listed by the source","fix":"- Apply the vendor patch from Oracle's Security Alert for CVE-2026-91405 (fixed version unknown from sources)\n- Restrict HTTP access to services that load the SDK until patched","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":"- Apply the vendor patch from Oracle's Security Alert for CVE-2026-91405 (fixed version unknown from sources)\n- Restrict HTTP access to services that load the SDK until patched","reach":"internet","title":"Oracle Outside In PDF Export SDK: unauthenticated takeover over HTTP","impact":"high","summary":"The Oracle Outside In PDF Export SDK, part of Oracle Fusion Middleware, has a flaw that a remote unauthenticated attacker can reach over HTTP. A successful attack, which needs a user to take an action, can take over the component and affect its confidentiality, integrity and availability.","category":"package","nicknames":[],"who_cares":["oracle","fusion-middleware","outside-in","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker takes over the Outside In component over HTTP","analyst_note":"Check Oracle's CVE-2026-91405 security alert for the fixed patch version and the exact affected product list; sources give only the NVD summary.","how_to_check":"- Check whether the Outside In PDF Export SDK is deployed, for example in Oracle Fusion Middleware installs, and note its version\n- Confirm the installed version against the affected release `8.5.8` listed by the source","needs_analyst":true,"not_affected_if":["no-outside-in-sdk"],"who_is_affected":"Teams running Oracle Fusion Middleware with the Outside In PDF Export SDK, version `8.5.8` per the source, that accept HTTP requests reaching PDF export. Attack complexity is high and a user must interact, so exposure depends on whether untrusted users can reach the export path. Teams without Oracle Outside In in their stack can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00067,"input_tokens":3484,"output_tokens":643,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-91405':13A,16A '/av':159C '3.1':146C,158C '7.5':149C '8.5.8':100C 'access':110C 'action':62B 'affect':69B,98C 'allow':105C 'attack':47B,54B,107C,120C,130C,132C 'avail':74B,153C 'base':147C 'compon':67B,87C 'compromis':114C 'confidenti':71B,150C 'cve':11A,14A 'cvss':145C,155C,157C 'difficult':101C 'exploit':103C 'export':5A,33B,91C 'flaw':42B 'fusion':18B,38B,85C 'fusion-middlewar':17B 'h':167C 'h/a':166C 'h/i':165C 'h/pr':161C 'host':27B 'http':10A,51B,112C 'human':122C 'impact':154C 'integr':72B,151C 'interact':123C 'middlewar':19B,39B,86C 'n/ac':160C 'n/ui':162C 'need':56B 'network':109C 'oracl':1A,20B,29B,37B,78C,84C,115C,141C 'outsid':2A,22B,30B,79C,88C,116C,142C 'outside-in':21B 'packag':24B 'part':35B 'pdf':4A,32B,90C 'person':126C 'product':82C 'r/s':163C 'reach':49B 'remot':45B 'requir':121C 'result':137C 'score':148C 'sdk':6A,34B,92C 'self':26B 'self-host':25B 'success':53B,119C,131C 'support':94C 'take':60B,64B 'takeov':8A,139C 'technolog':81C,118C,144C 'u/c':164C 'unauthent':7A,46B,106C 'user':58B 'vector':156C 'version':95C 'via':111C 'vulner':75C,104C,135C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Fusion Middleware with the Outside In PDF Export SDK, version `8.5.8` per the source, that accept HTTP requests reaching PDF export. Attack complexity is high and a user must interact, so exposure depends on whether untrusted users can reach the export path. 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-2026-91405","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91405","severity":null,"published_at":"2026-10-20T22:20:43+00:00","modified_at":"2026-10-23T20:17:28+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-2026-91405","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91405","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"}