{"id":"CVE-2026-91351","kind":"vulnerability","aliases":["CVE-2026-91351"],"related":[],"title":"Oracle Outside In Clean Content SDK: low-privilege local flaw allows data modification","description":"Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Clean Content SDK).   The supported version that is affected is 8.5.8. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Outside In Technology executes to compromise Oracle Outside In Technology.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Oracle Outside In Technology accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 6.1 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L).","summary":"Oracle Outside In Clean Content SDK version 8.5.8 has a flaw that lets a low-privileged user who can log on to the host modify or delete data handled by the library, and cause a partial denial of service. The CVSS 3.1 score is 6.1 with local attack vector, low privileges, and high integrity impact.","severity":"medium","cvss":6.1,"epss":0.00106,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["fusion-middleware","java-servers","oracle","outside-in","package"],"not_affected_if":["no-local-logon","sdk-not-installed"],"how_to_check":"- Check whether the Outside In Clean Content SDK is installed and which version: unknown\n- Confirm the installed version is `8.5.8` or earlier as listed in the NVD entry: unknown","fix":"- Apply the Oracle Critical Patch Update that covers Outside In Clean Content SDK; the fixed version is unknown from the sources","status":"open","published_at":"2026-10-20T22:20:37+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:03:35+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:03:35Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update that covers Outside In Clean Content SDK; the fixed version is unknown from the sources","reach":"local","title":"Oracle Outside In Clean Content SDK: low-privilege local flaw allows data modification","impact":"medium","summary":"Oracle Outside In Clean Content SDK version 8.5.8 has a flaw that lets a low-privileged user who can log on to the host modify or delete data handled by the library, and cause a partial denial of service. The CVSS 3.1 score is 6.1 with local attack vector, low privileges, and high integrity impact.","category":"package","nicknames":[],"who_cares":["oracle","fusion-middleware","outside-in","java-servers"],"confidence":0.6,"needs_auth":"yes","worst_case":"Low-privileged local user modifies or deletes data and partly disrupts service","analyst_note":"Find the fixed version and patch reference for Outside In Clean Content SDK 8.5.8 in Oracle's security alert for the relevant CPU.","how_to_check":"- Check whether the Outside In Clean Content SDK is installed and which version: unknown\n- Confirm the installed version is `8.5.8` or earlier as listed in the NVD entry: unknown","needs_analyst":true,"not_affected_if":["sdk-not-installed","no-local-logon"],"who_is_affected":"Teams running Oracle Fusion Middleware with the Outside In Clean Content SDK on servers where users can log on. The sources do not describe a network-reachable path, so exposure depends on who holds local logon to those hosts. Systems that do not run this SDK can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000656,"input_tokens":3529,"output_tokens":607,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-91351':17A,20A '/av':193C '3.1':74B,181C,192C '6.1':77B,184C '8.5.8':39B,113C 'abil':165C 'access':151C,161C 'affect':111C 'allow':12A,117C 'attack':80B,120C,139C 'avail':187C 'base':182C 'caus':66B,167C 'clean':4A,35B,103C 'compon':100C 'compromis':133C 'content':5A,36B,104C 'creation':147C 'critic':153C 'cve':15A,18A 'cvss':73B,180C,189C,191C 'data':13A,60B,154C,162C 'delet':59B,148C 'denial':69B,170C 'dos':174C 'easili':114C 'execut':131C 'exploit':115C 'flaw':11A,42B 'fusion':22B,98C 'fusion-middlewar':21B 'h/a':200C 'handl':61B 'high':85B 'host':56B 'impact':87B,188C 'infrastructur':125C 'integr':86B,185C 'java':25B 'java-serv':24B 'l':201C 'l/ac':194C 'l/pr':195C 'l/ui':196C 'let':44B 'librari':64B 'local':10A,79B 'log':52B 'logon':122C 'low':8A,47B,82B,118C 'low-privileg':7A,46B 'middlewar':23B,99C 'modif':14A,150C 'modifi':57B 'n/i':199C 'n/s':197C 'oracl':1A,27B,32B,91C,97C,127C,134C,157C,176C 'outsid':2A,29B,33B,92C,101C,128C,135C,158C,177C 'outside-in':28B 'packag':31B 'partial':68B,169C,173C 'privileg':9A,48B,83B,119C 'product':95C 'result':144C 'score':75B,183C 'sdk':6A,37B,105C 'server':26B 'servic':71B,172C 'success':138C 'support':107C 'technolog':94C,130C,137C,160C,179C 'u/c':198C 'unauthor':146C,164C 'user':49B 'vector':81B,190C 'version':38B,108C 'vulner':88C,116C,142C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Fusion Middleware with the Outside In Clean Content SDK on servers where users can log on. The sources do not describe a network-reachable path, so exposure depends on who holds local logon to those hosts. Systems that do not run this SDK can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:37+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91351","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91351","severity":null,"published_at":"2026-10-20T22:20:37+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},{"source":"epss","external_id":"CVE-2026-91351","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91351","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"}