{"id":"CVE-2026-91511","kind":"vulnerability","aliases":["CVE-2026-91511"],"related":[],"title":"Oracle E-Business Suite Purchasing: low-privilege network attack exposes critical data","description":"Vulnerability in the Oracle Purchasing product of Oracle E-Business Suite (component: Internal Operations).  Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Purchasing.  While the vulnerability is in Oracle Purchasing, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Oracle Purchasing accessible data as well as  unauthorized update, insert or delete access to some of Oracle Purchasing accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N).","summary":"Oracle E-Business Suite's Purchasing module, in versions 12.2.3 through 12.2.15, has a flaw in its Internal Operations component that an attacker can reach over HTTP with a low-privilege account. A successful attack can read critical Purchasing data, change or delete some of it, and can reach other products because the scope changes.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Oracle E-Business Suite (Purchasing, Internal Operations)","fixed":["October 2026 CPU patch (number in MOS)"],"affected":">= 12.2.3, <= 12.2.15","ecosystem":"vendor"}],"ecosystems":[],"tags":["authenticated","erp","oracle-ebs","purchasing","self-hosted","vendor"],"not_affected_if":["managed-hosting","purchasing-not-deployed","version-outside-12.2.3-12.2.15"],"how_to_check":"Confirm Purchasing is deployed on EBS 12.2.3-12.2.15. Then run the latest EBS CPU Checker (ECPUC, Patch 35583866, ECPUC.sql produces ECPUC.lst) to see whether the October 2026 CPU patches are applied. Oracle gives no exploit indicators.","fix":"Apply the Oracle E-Business Suite October 2026 CPU/CSPU patches for 12.2 (released 2026-10-20). Oracle's EBS patch availability document (MOS, via KA923) gives the exact patch number, which I could not see without a MOS login. Unknown: the specific patch ID.","status":"open","published_at":"2026-10-20T22:20:55+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-25T03:34:05+00:00","updated_at":"2026-10-25T03:34:58+00:00","category":"vendor","confidence":0.75,"triage":{"at":"2026-10-25T03:34:05Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Oracle E-Business Suite Purchasing: low-privilege network attack exposes critical data","impact":"high","summary":"Oracle E-Business Suite's Purchasing module, in versions 12.2.3 through 12.2.15, has a flaw in its Internal Operations component that an attacker can reach over HTTP with a low-privilege account. A successful attack can read critical Purchasing data, change or delete some of it, and can reach other products because the scope changes.","category":"vendor","nicknames":[],"who_cares":["oracle-ebs","purchasing","erp","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads critical Purchasing data and alters some records across products.","analyst_note":"Sources give no patch version or check steps; find Oracle's April 2026 CPU advisory for E-Business Suite 12.2.3-12.2.15 to confirm the fix release and whether the Internal Operations component is exposed.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["version-outside-12.2.3-12.2.15","purchasing-not-deployed"],"who_is_affected":"Organizations running Oracle E-Business Suite 12.2.3 through 12.2.15 with the Purchasing module in use. Attacking it requires a valid low-privilege login and a difficult-to-exploit condition. Sites on other versions, or without Purchasing deployed, are not in the stated range.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000629,"input_tokens":3534,"output_tokens":552,"severity_before":"high"},"analyst_status":"done","analyst_note":"Sources give no patch version or check steps; find Oracle's April 2026 CPU advisory for E-Business Suite 12.2.3-12.2.15 to confirm the fix release and whether the Internal Operations component is exposed.","search":"'-2026':16A,19A '-91511':17A,20A '/av':202C '12.2.15':51B,118C '12.2.3':49B,117C '3.1':190C,201C '7.1':193C 'access':129C,160C,166C,171C,181C,187C 'account':72B 'addit':147C 'affect':115C 'allow':123C 'attack':11A,62B,75B,126C,143C,152C 'authent':29B 'base':191C 'busi':4A,42B,106C 'business':24A 'c/c':207C 'chang':81B,95B,150C 'complet':165C 'compon':59B,108C 'compromis':133C 'confidenti':194C 'critic':13A,78B,162C 'cve':15A,18A 'cvss':189C,198C,200C 'data':14A,80B,163C,172C,188C 'delet':83B,180C 'difficult':119C 'e':3A,23A,41B,105C 'e-busi':2A,40B,104C 'e-business':22A 'eb':33B 'erp':30B 'exploit':121C 'expos':12A 'flaw':54B 'h/i':208C 'h/pr':204C 'host':37B 'http':66B,131C 'impact':146C,197C 'insert':178C 'integr':196C 'intern':57B,109C 'internal':27A 'l/a':209C 'l/ui':205C 'low':8A,70B,124C 'low-privileg':7A,69B 'may':144C 'modul':46B 'n':210C 'n/ac':203C 'n/s':206C 'network':10A,128C 'oper':58B,110C 'operations':28A 'oracl':1A,32B,39B,99C,103C,134C,141C,169C,185C 'oracle':21A 'oracle-eb':31B 'privileg':9A,71B,125C 'product':91B,101C,148C 'purchas':6A,34B,45B,79B,100C,135C,142C,170C,186C 'purchasing':26A 'reach':64B,89B 'read':77B 'result':157C 'scope':94B,149C 'score':192C 'self':36B 'self-host':35B 'signific':145C 'success':74B,151C 'suit':5A,43B,107C 'suite':25A 'support':111C 'unauthor':159C,176C 'updat':177C 'vector':199C 'vendor':38B 'version':48B,112C 'via':130C 'vulner':96C,122C,138C,155C 'well':174C","nicknames":[],"mitigations":[],"who_affected":"Organizations running Oracle E-Business Suite 12.2.3 through 12.2.15 with the Purchasing module in use. Attacking it requires a valid low-privilege login and a difficult-to-exploit condition. Sites on other versions, or without Purchasing deployed, are not in the stated range.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:55+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91511","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91511","severity":null,"published_at":"2026-10-20T22:20:55+00:00","modified_at":"2026-10-21T18:44:55+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","fetched_at":"2026-10-23T22:29:00+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-91511:745","url":null,"severity":null,"published_at":"2026-10-25T03:34:58+00:00","modified_at":"2026-10-25T03:34:58+00:00","first_seen_at":"2026-10-25T03:34:58+00:00","fetched_at":"2026-10-25T03:34:58+00:00","note":"Fix is in Oracle's October 2026 CPU (released 2026-10-20), not April as triage guessed; the CPU advisory lists EBS 12.2.3-12.2.15. I could not read this CVE's risk-matrix row (page truncated) and the patch number is only in MOS, so nothing is marked verified. No exploitation or PoC found (Armis also says none)."}],"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":2337,"url":"https://blogs.oracle.com/ebstech/critical-patch-update-for-october-2026-now-available","title":"Critical Patch Update for October 2026 Now Available (EBS)","kind":"vendor","source":"analyst","text":"EBS CSPU/CPU for October 2026 released 20 Oct 2026. Oracle strongly recommends applying without delay. Latest EBS CPU doc is found via MOS KA923.","published_at":null,"relation":"fix","confidence":null,"note":null},{"id":3235,"url":"https://blogs.oracle.com/ebstech/april-2026-updates-to-ebs-critical-patch-update-checker-ecpuc","title":"April 2026 Updates to EBS Critical Patch Update Checker (ECPUC)","kind":"vendor","source":"analyst","text":"ECPUC (Patch 35583866) generates ECPUC.lst listing current EBS CPU level and required patches. Always use the latest version; older versions do not check new CPU patches.","published_at":null,"relation":"mentions","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"}