{"id":"CVE-2026-85299","kind":"vulnerability","aliases":["CVE-2026-85299"],"related":[],"title":"Google Compute Engine: disk snapshot API lets attackers copy cross-project disk data","description":"A Missing Authorization vulnerability in the disks.createSnapshot and regionDisks.createSnapshot APIs in Google Compute Engine versions prior to 2026-08-31 on Google Cloud Platform allows an authenticated attacker to exfiltrate cross-project disk data.\n\n\nThis vulnerability was patched on 31 August 2026, and no customer action is needed.","summary":"The disks.createSnapshot and regionDisks.createSnapshot APIs in Google Compute Engine lacked an authorization check. An authenticated attacker can use them to export disk data belonging to other Google Cloud projects.","severity":"high","cvss":8.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["compute-engine","google-cloud","vendor"],"not_affected_if":["patched-by-vendor"],"how_to_check":null,"fix":"- Google patched this on 31 August 2026 and says no customer action is needed.","status":"open","published_at":"2026-10-27T10:16:56+00:00","first_seen_at":"2026-10-27T10:31:03+00:00","triaged_at":"2026-10-27T10:31:54+00:00","updated_at":"2026-10-27T10:31:54+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-27T10:31:54Z","model":"claude-haiku-5-5","output":{"fix":"- Google patched this on 31 August 2026 and says no customer action is needed.","reach":"internet","title":"Google Compute Engine: disk snapshot API lets attackers copy cross-project disk data","impact":"high","summary":"The disks.createSnapshot and regionDisks.createSnapshot APIs in Google Compute Engine lacked an authorization check. An authenticated attacker can use them to export disk data belonging to other Google Cloud projects.","category":"vendor","nicknames":[],"who_cares":["google-cloud","compute-engine"],"confidence":0.7,"needs_auth":"yes","worst_case":"Authenticated attacker exfiltrates disk data from other projects.","analyst_note":"","how_to_check":"unknown","needs_analyst":false,"not_affected_if":["patched-by-vendor"],"who_is_affected":"The sources describe this as a flaw in Google's hosted Compute Engine service, patched by Google on 31 August 2026. Customers are not expected to change anything. Teams running on Google Cloud can skip manual action, though they may still review cross-project IAM grants.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000544,"input_tokens":3348,"output_tokens":419,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-08':75C '-2026':16A,19A '-31':76C '-85299':17A,20A '2026':74C,99C '31':97C 'action':103C 'allow':81C 'api':6A,32B,66C 'attack':8A,43B,84C 'august':98C 'authent':42B,83C 'author':39B,59C 'belong':51B 'check':40B 'cloud':26B,55B,79C 'comput':2A,22B,35B,69C 'compute-engin':21B 'copi':9A 'cross':11A,88C 'cross-project':10A,87C 'custom':102C 'cve':15A,18A 'data':14A,50B,91C 'disk':4A,13A,49B,90C 'disks.createsnapshot':29B,63C 'engin':3A,23B,36B,70C 'exfiltr':86C 'export':48B 'googl':1A,25B,34B,54B,68C,78C 'google-cloud':24B 'lack':37B 'let':7A 'miss':58C 'need':105C 'patch':95C 'platform':80C 'prior':72C 'project':12A,56B,89C 'regiondisks.createsnapshot':31B,65C 'snapshot':5A 'use':45B 'vendor':27B 'version':71C 'vulner':60C,93C","nicknames":[],"mitigations":[],"who_affected":"The sources describe this as a flaw in Google's hosted Compute Engine service, patched by Google on 31 August 2026. Customers are not expected to change anything. Teams running on Google Cloud can skip manual action, though they may still review cross-project IAM grants.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T10:16:56+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Clear","cvss_by":"f45cbf4e-4146-4068-b7e1-655ffc2c548c","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-85299","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85299","severity":null,"published_at":"2026-10-27T10:16:56+00:00","modified_at":"2026-10-27T10:16:56+00:00","first_seen_at":"2026-10-27T10:31:03+00:00","fetched_at":"2026-10-27T10:31:03+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"}