{"id":"CVE-2026-123276","kind":"vulnerability","aliases":["CVE-2026-123276"],"related":[],"title":"JetBrains CLion: crafted GDB debug profile runs code in Safe Mode","description":"In JetBrains CLion before 2026.3, \n2026.2.4.1 code execution was possible in Safe Mode via a crafted GDB server debug profile","summary":"In JetBrains CLion before 2026.3 and 2026.2.4.1, a crafted GDB server debug profile could execute code even while Safe Mode was on. An attacker who gets a developer to open a malicious project or profile could run commands on that developer's machine.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["clion","gdb","ide","jetbrains","package"],"not_affected_if":["clion-updated","trusted-projects-only"],"how_to_check":"- Check the installed CLion version under Help > About in the IDE; versions before `2026.3` (and `2026.2.4.1` on the 2026.2 line) are in the affected range.\n- Review debug profiles in shared or untrusted projects for GDB server configurations that you did not write.","fix":"- JetBrains CLion: move to `2026.3` or later, or to `2026.2.4.1` on the 2026.2 line.","status":"open","published_at":"2026-11-06T11:17:05+00:00","first_seen_at":"2026-11-06T11:41:23+00:00","triaged_at":"2026-11-06T11:42:02+00:00","updated_at":"2026-11-06T11:42:02+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-06T11:42:02Z","model":"claude-haiku-5-5","output":{"fix":"- JetBrains CLion: move to `2026.3` or later, or to `2026.2.4.1` on the 2026.2 line.","reach":"local","title":"JetBrains CLion: crafted GDB debug profile runs code in Safe Mode","impact":"high","summary":"In JetBrains CLion before 2026.3 and 2026.2.4.1, a crafted GDB server debug profile could execute code even while Safe Mode was on. An attacker who gets a developer to open a malicious project or profile could run commands on that developer's machine.","audience":"developers","category":"package","nicknames":[],"who_cares":["clion","jetbrains","ide","gdb"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"code runs on the developer's machine despite Safe Mode","analyst_note":"","how_to_check":"- Check the installed CLion version under Help > About in the IDE; versions before `2026.3` (and `2026.2.4.1` on the 2026.2 line) are in the affected range.\n- Review debug profiles in shared or untrusted projects for GDB server configurations that you did not write.","plain_action":"","needs_analyst":false,"not_affected_if":["trusted-projects-only","clion-updated"],"who_is_affected":"Developers who use JetBrains CLion and open projects from sources they do not fully trust, since the flaw is triggered by a crafted debug profile in the project. Teams that only open their own version-controlled projects and do not run unknown debug configurations have a lower exposure. The sources do not describe a server-side or network-reachable path.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000711,"input_tokens":4191,"output_tokens":583,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-123276':14A,17A '-2026':13A,16A '2026.2.4.1':29B,71C '2026.3':27B,70C 'attack':46B 'clion':2A,18B,25B,68C 'code':8A,38B,72C 'command':60B 'could':36B,58B 'craft':3A,31B,81C 'cve':12A,15A 'debug':5A,34B,84C 'develop':50B,63B 'even':39B 'execut':37B,73C 'gdb':4A,19B,32B,82C 'get':48B 'ide':20B 'jetbrain':1A,21B,24B,67C 'machin':65B 'malici':54B 'mode':11A,42B,78C 'open':52B 'packag':22B 'possibl':75C 'profil':6A,35B,57B,85C 'project':55B 'run':7A,59B 'safe':10A,41B,77C 'server':33B,83C 'via':79C","nicknames":[],"mitigations":[],"who_affected":"Developers who use JetBrains CLion and open projects from sources they do not fully trust, since the flaw is triggered by a crafted debug profile in the project. Teams that only open their own version-controlled projects and do not run unknown debug configurations have a lower exposure. The sources do not describe a server-side or network-reachable path.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["clion","gdb","high","ide","jetbrains","package"],"campaign_type":null,"search_a":"'-123276':14A,17A '-2026':13A,16A 'clion':2A 'code':8A 'craft':3A 'cve':12A,15A 'debug':5A 'gdb':4A 'jetbrain':1A 'mode':11A 'profil':6A 'run':7A 'safe':10A","search_b":"'2026.2.4.1':29B '2026.3':27B 'attack':46B 'clion':18B,25B 'code':38B 'command':60B 'could':36B,58B 'craft':31B 'debug':34B 'develop':50B,63B 'even':39B 'execut':37B 'gdb':19B,32B 'get':48B 'ide':20B 'jetbrain':21B,24B 'machin':65B 'malici':54B 'mode':42B 'open':52B 'packag':22B 'profil':35B,57B 'project':55B 'run':59B 'safe':41B 'server':33B","search_c":"'2026.2.4.1':71C '2026.3':70C 'clion':68C 'code':72C 'craft':81C 'debug':84C 'execut':73C 'gdb':82C 'jetbrain':67C 'mode':78C 'possibl':75C 'profil':85C 'safe':77C 'server':83C 'via':79C","first_public_at":"2026-11-06T11:17:05+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/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-2026-123276","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123276","severity":null,"published_at":"2026-11-06T11:17:05+00:00","modified_at":"2026-11-06T11:17:05+00:00","first_seen_at":"2026-11-06T11:41:23+00:00","fetched_at":"2026-11-06T11:41:23+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"}