{"id":"CVE-2026-101556","kind":"vulnerability","aliases":["CVE-2026-101556"],"related":[],"title":"Oracle E-Business Suite Payroll: low-privilege network attacker can take over","description":"Vulnerability in the Oracle Payroll 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 Payroll.  Successful attacks of this vulnerability can result in takeover of Oracle Payroll. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).","summary":"Oracle Payroll inside E-Business Suite versions 12.2.3 through 12.2.15 has a flaw in its Internal Operations component that can be reached over HTTP. A low-privileged attacker with network access can take over the Payroll application, with high confidentiality, integrity and availability impact.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Oracle E-Business Suite Payroll","fixed":["October 2026 CPU patch (number in MOS)"],"affected":">= 12.2.3, <= 12.2.15","ecosystem":"vendor"}],"ecosystems":[],"tags":["http","oracle-ebs","payroll","self-hosted","vendor"],"not_affected_if":["oct-2026-cpu-applied","payroll-not-installed","unknown"],"how_to_check":"Run the EBS CPU Checker (ECPUC, Patch 35583866): run ECPUC.sql and read ECPUC.lst for your current CPU/CSPU level and missing patches. Any 12.2.3-12.2.15 install without the Oct 2026 CPU is exposed.","fix":"Apply the Oracle E-Business Suite October 2026 CPU (or later CSPU) for Release 12.2; find the current patch via MOS Article KA923. Exact patch number unknown (needs MOS login).","status":"open","published_at":"2026-10-20T22:18:05+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","triaged_at":"2026-10-25T03:20:20+00:00","updated_at":"2026-10-25T03:26:55+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-25T03:20:20Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Oracle E-Business Suite Payroll: low-privilege network attacker can take over","impact":"high","summary":"Oracle Payroll inside E-Business Suite versions 12.2.3 through 12.2.15 has a flaw in its Internal Operations component that can be reached over HTTP. A low-privileged attacker with network access can take over the Payroll application, with high confidentiality, integrity and availability impact.","category":"vendor","nicknames":[],"who_cares":["oracle-ebs","payroll","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker takes over the Payroll application and its data","analyst_note":"Find Oracle's Security Alert or patch advisory for E-Business Suite Payroll 12.2.3-12.2.15 to get the fixed patch and a way to check exposure; the NVD entry alone gives neither.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Organisations running Oracle E-Business Suite Payroll in the 12.2.3 to 12.2.15 range that expose its HTTP interface to users or networks where low-privileged accounts exist. Sources do not say which patch level is safe or which configurations matter, so check Oracle's Security Alert for the affected release.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000597,"input_tokens":3447,"output_tokens":505,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find Oracle's Security Alert or patch advisory for E-Business Suite Payroll 12.2.3-12.2.15 to get the fixed patch and a way to check exposure; the NVD entry alone gives neither.","search":"'-101556':16A,19A '-2026':15A,18A '/av':147C '12.2.15':45B,103C '12.2.3':43B,102C '3.1':134C,146C '7.5':137C 'access':67B,114C 'affect':100C 'allow':108C 'applic':73B 'attack':11A,64B,111C,122C 'avail':79B,141C 'base':135C 'busi':4A,40B,91C 'business':23A 'compon':53B,93C 'compromis':118C 'confidenti':76B,138C 'cve':14A,17A 'cvss':133C,143C,145C 'difficult':104C 'e':3A,22A,39B,90C 'e-busi':2A,38B,89C 'e-business':21A 'eb':29B 'exploit':106C 'flaw':48B 'h':155C 'h/a':154C 'h/i':153C 'h/pr':149C 'high':75B 'host':33B 'http':26B,59B,116C 'impact':80B,142C 'insid':37B 'integr':77B,139C 'intern':51B,94C 'l/ui':150C 'low':8A,62B,109C 'low-privileg':7A,61B 'n/ac':148C 'n/s':151C 'network':10A,66B,113C 'oper':52B,95C 'oracl':1A,28B,35B,84C,88C,119C,131C 'oracle':20A 'oracle-eb':27B 'payrol':6A,30B,36B,72B,85C,120C,132C 'payroll':25A 'privileg':9A,63B,110C 'product':86C 'reach':57B 'result':127C 'score':136C 'self':32B 'self-host':31B 'success':121C 'suit':5A,41B,92C 'suite':24A 'support':96C 'take':13A,69B 'takeov':129C 'u/c':152C 'vector':144C 'vendor':34B 'version':42B,97C 'via':115C 'vulner':81C,107C,125C","nicknames":[],"mitigations":[],"who_affected":"Self-hosted Oracle E-Business Suite 12.2.3-12.2.15 with Payroll, where the HTTP interface is reachable by anyone with a low-privileged account. Harder to exploit (AC:H) but gives full takeover of Payroll. Oracle-hosted or Payroll-unused sites with no Payroll module deployed can likely skip, but confirm with ECPUC.","tier":"B","verified":{"how_to_check":{"at":"2026-10-25T03:26:55Z","by":"analyst","run_id":718}},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:05+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-101556","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101556","severity":null,"published_at":"2026-10-20T22:18:05+00:00","modified_at":"2026-10-21T14:29:49+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","fetched_at":"2026-10-23T22:28:58+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-101556:718","url":null,"severity":null,"published_at":"2026-10-25T03:26:55+00:00","modified_at":"2026-10-25T03:26:55+00:00","first_seen_at":"2026-10-25T03:26:55+00:00","fetched_at":"2026-10-25T03:26:55+00:00","note":"Fixed in Oracle October 2026 CPU (20 Oct 2026; EBS row 12.2.3-12.2.15). Specific patch number is in MOS (KA923), not public; per-CVE risk matrix not read. No exploitation or PoC found; not in KEV. Sibling Payroll CVEs (101708-101712) exist."}],"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":2336,"url":"https://blogs.oracle.com/ebstech/october-2026-updates-to-ebs-critical-patch-update-checker-ecpuc","title":"October 2026 Updates to EBS Critical Patch Update Checker (ECPUC)","kind":"vendor","source":"analyst","text":null,"published_at":null,"relation":"fix","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}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}