{"id":"CVE-2026-87347","kind":"vulnerability","aliases":["CVE-2026-87347"],"related":[],"title":"Oracle HTTP Server: OSSL module flaw lets low-privilege users take over","description":"Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: OSSL Module).  Supported versions that are affected are 12.2.1.4.0 and  14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle HTTP Server.  While the vulnerability is in Oracle HTTP Server, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Oracle HTTP Server accessible data as well as  unauthorized access to critical data or complete access to all Oracle HTTP Server accessible data. CVSS 3.1 Base Score 9.6 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N).","summary":"A flaw in the OSSL module of Oracle HTTP Server 12.2.1.4.0 and 14.1.2.0.0 (CVSS 9.6, scope changed) lets a low-privileged network attacker read and modify critical data, with impact on other components. Fixed in Oracle's October 2026 CPU. No exploitation reported.","severity":"critical","cvss":9.6,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Oracle HTTP Server","fixed":["12.2.1.4.0 + patch 40005842","14.1.2.0.0 + patch 39987730"],"affected":"12.2.1.4.0, 14.1.2.0.0","ecosystem":"vendor"}],"ecosystems":[],"tags":["oracle-fusion-middleware","oracle-http-server","runtime","self-hosted"],"not_affected_if":["default-config","no-ohs-deployed","other-versions"],"how_to_check":"On the OHS host run: $ORACLE_HOME/OPatch/opatch lspatches and look for 40005842 (12.2.1.4.0) or 39987730 (14.1.2.0.0). Run $ORACLE_HOME/OPatch/opatch version / check the OHS version to see if you run 12.2.1.4.0 or 14.1.2.0.0. Also check whether the OSSL module (mod_ossl) is loaded in httpd.conf / ssl.conf. Tenable plugins 369017 and 369018 detect it.","fix":"Apply the October 2026 CPU patch for Oracle HTTP Server: patch 40005842 for 12.2.1.4.0, patch 39987730 for 14.1.2.0.0 (per Rapid7; confirm in the CPU advisory/My Oracle Support). Oracle gives no workaround; limiting network access to OHS to trusted segments only reduces exposure (Armis).","status":"open","published_at":"2026-10-20T22:20:12+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","triaged_at":"2026-10-23T22:34:37+00:00","updated_at":"2026-10-23T23:03:53+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-23T22:34:37Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Oracle HTTP Server: OSSL module flaw lets low-privilege users take over","impact":"high","summary":"A flaw in the OSSL module of Oracle HTTP Server, part of Oracle Fusion Middleware, lets a low-privileged attacker over the network compromise the server. Successful attacks can create, change or delete critical data and reach other products on the same deployment.","category":"runtime","who_cares":["oracle-fusion-middleware","oracle-http-server","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"attacker modifies or deletes critical data and reaches other products","analyst_note":"Check Oracle's Critical Patch Update advisory for the patch level for 12.2.1.4.0 and 14.1.2.0.0 and any mitigation for the OSSL module; the sources give no fix or detection steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000511,"input_tokens":3179,"output_tokens":387,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Check Oracle's Critical Patch Update advisory for the patch level for 12.2.1.4.0 and 14.1.2.0.0 and any mitigation for the OSSL module; the sources give no fix or detection steps.","search":"'-2026':14A,17A '-87347':15A,18A '/av':189C '12.2.1.4.0':44B,98C '14.1.2.0.0':46B,100C '2026':73B '3.1':177C,188C '9.6':48B,180C 'access':110C,147C,156C,162C,168C,174C 'addit':130C 'affect':96C 'allow':104C 'attack':57B,107C,126C,135C 'base':178C 'c/c':194C 'chang':50B,133C 'complet':167C 'compon':67B,89C 'compromis':114C 'confidenti':181C 'cpu':74B 'creation':143C 'critic':61B,149C,164C 'cve':13A,16A 'cvss':47B,176C,185C,187C 'data':62B,150C,157C,165C,175C 'delet':144C 'easili':101C 'exploit':76B,102C 'fix':68B 'flaw':6A,35B 'fusion':24B,87C 'h/a':196C 'h/i':195C 'host':33B 'http':2A,20A,28B,42B,82C,112C,116C,124C,154C,172C 'impact':64B,129C,184C 'integr':183C 'l/pr':191C 'l/ui':192C 'let':7A,51B 'low':9A,54B,105C 'low-privileg':8A,53B 'may':127C 'middlewar':25B,88C 'modif':146C 'modifi':60B 'modul':5A,39B,91C 'n':197C 'n/ac':190C 'n/s':193C 'network':56B,109C 'octob':72B 'oracl':1A,23B,27B,41B,70B,81C,86C,115C,123C,153C,171C 'oracle':19A 'oracle-fusion-middlewar':22B 'oracle-http-serv':26B 'ossl':4A,38B,90C 'privileg':10A,55B,106C 'product':84C,131C 'read':58B 'report':77B 'result':140C 'runtim':30B 'scope':49B,132C 'score':179C 'self':32B 'self-host':31B 'server':3A,21A,29B,43B,83C,117C,125C,155C,173C 'signific':128C 'success':134C 'support':92C 'take':12A 'unauthor':142C,161C 'user':11A 'vector':186C 'version':93C 'via':111C 'vulner':78C,103C,120C,138C 'well':159C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:12+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-87347","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87347","severity":null,"published_at":"2026-10-20T22:20:12+00:00","modified_at":"2026-10-21T18:44:19+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","fetched_at":"2026-10-23T22:29:00+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-87347:357","url":null,"severity":null,"published_at":"2026-10-23T23:03:53+00:00","modified_at":"2026-10-23T23:03:53+00:00","first_seen_at":"2026-10-23T23:03:53+00:00","fetched_at":"2026-10-23T23:03:53+00:00","note":"Oracle Oct 2026 CPU; affected 12.2.1.4.0 and 14.1.2.0.0 (cve.org). Patch numbers come from Rapid7, not read on Oracle's own page (MOS needs login). No exploitation or PoC seen, not in KEV; no social search done."}],"documents":[{"id":1637,"url":"https://www.oracle.com/security-alerts/cpuoct2026.html","title":"Oracle Critical Patch Update Advisory - October 2026","kind":"advisory","source":"analyst","text":"Lists Oracle E-Business Suite, versions 12.2.3-12.2.15 as affected; patches via Patch Availability Document (MOS). Released 2026-10-20.","published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":1758,"url":"https://www.rapid7.com/db/vulnerabilities/cve-2026-87347/","title":"Rapid7: CVE-2026-87347 (patch numbers)","kind":"other","source":"analyst","text":null,"published_at":null,"relation":"fix","confidence":null,"note":null},{"id":1760,"url":"https://www.cve.org/CVERecord?id=CVE-2026-87347","title":"CVE Record CVE-2026-87347 (Oracle CNA text)","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"describes","confidence":null,"note":null}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}