{"id":"CVE-2026-123290","kind":"vulnerability","aliases":["CVE-2026-123290"],"related":[],"title":"JetBrains Datalore: hidden notebook code exposed via public report endpoint","description":"In JetBrains Datalore before 2026.4 hidden notebook code was exposed to unauthenticated users via the public interactive report content endpoint","summary":"In JetBrains Datalore before 2026.4, code that was hidden in a notebook was returned to unauthenticated users through the public interactive report content endpoint. An attacker can read notebook code that the author meant to keep out of view.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["datalore","jetbrains","self-hosted","vendor"],"not_affected_if":["fixed-version","no-public-reports"],"how_to_check":null,"fix":"- Datalore: upgrade to 2026.4 or later (the sources state the fixed release as 2026.4)","status":"open","published_at":"2026-11-06T11:17:07+00:00","first_seen_at":"2026-11-06T11:41:24+00:00","triaged_at":"2026-11-06T11:42:35+00:00","updated_at":"2026-11-06T11:42:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-06T11:42:35Z","model":"claude-haiku-5-5","output":{"fix":"- Datalore: upgrade to 2026.4 or later (the sources state the fixed release as 2026.4)","reach":"internet","title":"JetBrains Datalore: hidden notebook code exposed via public report endpoint","impact":"low","summary":"In JetBrains Datalore before 2026.4, code that was hidden in a notebook was returned to unauthenticated users through the public interactive report content endpoint. An attacker can read notebook code that the author meant to keep out of view.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["datalore","jetbrains","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"unauthenticated users read hidden notebook code","analyst_note":"Confirm which Datalore configurations expose the public interactive report endpoint and how to check for them; the NVD entry alone does not say.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":["fixed-version","no-public-reports"],"who_is_affected":"Teams that run Datalore and publish interactive reports through its public endpoint are exposed. Installations that do not publish interactive reports, or that run a release at or after 2026.4, are not affected. The sources do not say which report settings or configurations make the public endpoint reachable.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000666,"input_tokens":4176,"output_tokens":496,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-123290':13A,16A '-2026':12A,15A '2026.4':27B,66C 'attack':48B 'author':55B 'code':5A,28B,52B,69C 'content':45B,80C 'cve':11A,14A 'datalor':2A,17B,25B,64C 'endpoint':10A,46B,81C 'expos':6A,71C 'hidden':3A,31B,67C 'host':21B 'interact':43B,78C 'jetbrain':1A,18B,24B,63C 'keep':58B 'meant':56B 'notebook':4A,34B,51B,68C 'public':8A,42B,77C 'read':50B 'report':9A,44B,79C 'return':36B 'self':20B 'self-host':19B 'unauthent':38B,73C 'user':39B,74C 'vendor':22B 'via':7A,75C 'view':61B","nicknames":[],"mitigations":[],"who_affected":"Teams that run Datalore and publish interactive reports through its public endpoint are exposed. Installations that do not publish interactive reports, or that run a release at or after 2026.4, are not affected. The sources do not say which report settings or configurations make the public endpoint reachable.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["datalore","jetbrains","medium","selfhosted","vendor"],"campaign_type":null,"search_a":"'-123290':13A,16A '-2026':12A,15A 'code':5A 'cve':11A,14A 'datalor':2A 'endpoint':10A 'expos':6A 'hidden':3A 'jetbrain':1A 'notebook':4A 'public':8A 'report':9A 'via':7A","search_b":"'2026.4':27B 'attack':48B 'author':55B 'code':28B,52B 'content':45B 'datalor':17B,25B 'endpoint':46B 'hidden':31B 'host':21B 'interact':43B 'jetbrain':18B,24B 'keep':58B 'meant':56B 'notebook':34B,51B 'public':42B 'read':50B 'report':44B 'return':36B 'self':20B 'self-host':19B 'unauthent':38B 'user':39B 'vendor':22B 'view':61B","search_c":"'2026.4':66C 'code':69C 'content':80C 'datalor':64C 'endpoint':81C 'expos':71C 'hidden':67C 'interact':78C 'jetbrain':63C 'notebook':68C 'public':77C 'report':79C 'unauthent':73C 'user':74C 'via':75C","first_public_at":"2026-11-06T11:17:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvss_by":"cve@jetbrains.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-123290","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123290","severity":null,"published_at":"2026-11-06T11:17:07+00:00","modified_at":"2026-11-06T11:17:07+00:00","first_seen_at":"2026-11-06T11:41:24+00:00","fetched_at":"2026-11-06T11:41:24+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}