{"id":"CVE-2026-123305","kind":"vulnerability","aliases":["CVE-2026-123305"],"related":[],"title":"JetBrains IntelliJ IDEA: path traversal when unpacking remote Dev Container archives","description":"In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via unpacking Dev Container archives from a remote host","summary":"Before IntelliJ IDEA 2026.3, unpacking Dev Container archives downloaded from a remote host could write files outside the intended directory. An attacker who controls such an archive could place files at arbitrary locations on a developer's machine.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dev-containers","intellij-idea","jetbrains","package"],"not_affected_if":["no-remote-dev-container-archives","version-2026.3-or-later"],"how_to_check":"- Check the IntelliJ IDEA version in Help > About; versions before `2026.3` are listed as affected.","fix":"- JetBrains IntelliJ IDEA: move to `2026.3` or later.","status":"open","published_at":"2026-11-06T11:17:09+00:00","first_seen_at":"2026-11-06T11:41:25+00:00","triaged_at":"2026-11-06T11:42:06+00:00","updated_at":"2026-11-06T11:42:06+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-06T11:42:06Z","model":"claude-haiku-5-5","output":{"fix":"- JetBrains IntelliJ IDEA: move to `2026.3` or later.","reach":"network","title":"JetBrains IntelliJ IDEA: path traversal when unpacking remote Dev Container archives","impact":"medium","summary":"Before IntelliJ IDEA 2026.3, unpacking Dev Container archives downloaded from a remote host could write files outside the intended directory. An attacker who controls such an archive could place files at arbitrary locations on a developer's machine.","audience":"developers","category":"package","nicknames":[],"who_cares":["intellij-idea","jetbrains","dev-containers"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"Files written outside the intended directory on the developer's machine","analyst_note":"","how_to_check":"- Check the IntelliJ IDEA version in Help > About; versions before `2026.3` are listed as affected.\n- unknown for other checks; the sources do not say which configurations trigger the Dev Container remote unpacking path.","plain_action":"","needs_analyst":false,"not_affected_if":["version-2026.3-or-later","no-remote-dev-container-archives"],"who_is_affected":"Developers who use IntelliJ IDEA and open Dev Container archives fetched from a remote host are affected. The sources do not say whether opening a local archive or a particular workflow is also exposed.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000678,"input_tokens":4179,"output_tokens":521,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-123305':14A,17A '-2026':13A,16A '2026.3':29B,69C 'arbitrari':57B 'archiv':11A,33B,52B,78C 'attack':47B 'contain':10A,20B,32B,77C 'control':49B 'could':39B,53B 'cve':12A,15A 'dev':9A,19B,31B,76C 'dev-contain':18B 'develop':61B 'directori':45B 'download':34B 'file':41B,55B 'host':38B,82C 'idea':3A,23B,28B,67C 'intellij':2A,22B,27B,66C 'intellij-idea':21B 'intend':44B 'jetbrain':1A,24B,65C 'locat':58B 'machin':63B 'outsid':42B 'packag':25B 'path':4A,70C 'place':54B 'possibl':73C 'remot':8A,37B,81C 'travers':5A,71C 'unpack':7A,30B,75C 'via':74C 'write':40B","nicknames":[],"mitigations":[],"who_affected":"Developers who use IntelliJ IDEA and open Dev Container archives fetched from a remote host are affected. The sources do not say whether opening a local archive or a particular workflow is also exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["devcontainers","high","intellijidea","jetbrains","package"],"campaign_type":null,"search_a":"'-123305':14A,17A '-2026':13A,16A 'archiv':11A 'contain':10A 'cve':12A,15A 'dev':9A 'idea':3A 'intellij':2A 'jetbrain':1A 'path':4A 'remot':8A 'travers':5A 'unpack':7A","search_b":"'2026.3':29B 'arbitrari':57B 'archiv':33B,52B 'attack':47B 'contain':20B,32B 'control':49B 'could':39B,53B 'dev':19B,31B 'dev-contain':18B 'develop':61B 'directori':45B 'download':34B 'file':41B,55B 'host':38B 'idea':23B,28B 'intellij':22B,27B 'intellij-idea':21B 'intend':44B 'jetbrain':24B 'locat':58B 'machin':63B 'outsid':42B 'packag':25B 'place':54B 'remot':37B 'unpack':30B 'write':40B","search_c":"'2026.3':69C 'archiv':78C 'contain':77C 'dev':76C 'host':82C 'idea':67C 'intellij':66C 'jetbrain':65C 'path':70C 'possibl':73C 'remot':81C 'travers':71C 'unpack':75C 'via':74C","first_public_at":"2026-11-06T11:17:09+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"cve@jetbrains.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-123305","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123305","severity":null,"published_at":"2026-11-06T11:17:09+00:00","modified_at":"2026-11-06T11:17:09+00:00","first_seen_at":"2026-11-06T11:41:25+00:00","fetched_at":"2026-11-06T11:41:25+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"}