{"id":"CVE-2026-107327","kind":"vulnerability","aliases":["CVE-2026-107327"],"related":[],"title":"Langflow: authenticated users can run arbitrary code through missing authorization","description":"IBM Langflow OSS 1.0.0 through 1.12.4 could allow a remote authenticated attacker to execute arbitrary code due to missing authorization.","summary":"IBM Langflow OSS versions 1.0.0 through 1.12.4 lack an authorization check in one path. A logged-in attacker can use it to execute arbitrary code on the server.","severity":"critical","cvss":9.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ai-apps","ai-tooling","langflow","self-hosted"],"not_affected_if":["versions-outside-range"],"how_to_check":"- Check the installed Langflow version, for example with `pip show langflow`, and compare it to the affected range `1.0.0` through `1.12.4`.","fix":"- Move to a Langflow OSS release newer than `1.12.4`; the exact fixed version is unknown from the sources.","status":"open","published_at":"2026-10-29T16:17:50+00:00","first_seen_at":"2026-10-29T16:25:55+00:00","triaged_at":"2026-10-29T16:27:11+00:00","updated_at":"2026-10-29T16:27:11+00:00","category":"ai-tooling","confidence":0.6,"triage":{"at":"2026-10-29T16:27:11Z","model":"claude-haiku-5-5","output":{"fix":"- Move to a Langflow OSS release newer than `1.12.4`; the exact fixed version is unknown from the sources.","reach":"network","title":"Langflow: authenticated users can run arbitrary code through missing authorization","impact":"high","summary":"IBM Langflow OSS versions 1.0.0 through 1.12.4 lack an authorization check in one path. A logged-in attacker can use it to execute arbitrary code on the server.","audience":"businesses","category":"ai-tooling","nicknames":[],"who_cares":["langflow","self-hosted","ai-apps"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Code runs on the Langflow server with the service's privileges","analyst_note":"Confirm the fixed version and whether default configuration is affected, using the IBM advisory linked from the NVD entry.","how_to_check":"- Check the installed Langflow version, for example with `pip show langflow`, and compare it to the affected range `1.0.0` through `1.12.4`.\n- unknown","plain_action":"","needs_analyst":true,"not_affected_if":["versions-outside-range"],"who_is_affected":"Teams running self-hosted IBM Langflow OSS in the affected range are exposed. An attacker needs a valid account on the instance, and the sources do not say whether default configuration is affected. unknown whether managed or hosted Langflow services are involved.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000674,"input_tokens":4093,"output_tokens":529,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-107327':13A,16A '-2026':12A,15A '1.0.0':31B,59C '1.12.4':33B,61C 'ai':18B,21B 'ai-app':17B 'ai-tool':20B 'allow':63C 'app':19B 'arbitrari':6A,51B,70C 'attack':45B,67C 'authent':2A,66C 'author':10A,36B,75C 'check':37B 'code':7A,52B,71C 'could':62C 'cve':11A,14A 'due':72C 'execut':50B,69C 'host':26B 'ibm':27B,56C 'lack':34B 'langflow':1A,23B,28B,57C 'log':43B 'logged-in':42B 'miss':9A,74C 'one':39B 'oss':29B,58C 'path':40B 'remot':65C 'run':5A 'self':25B 'self-host':24B 'server':55B 'tool':22B 'use':47B 'user':3A 'version':30B","nicknames":[],"mitigations":[],"who_affected":"Teams running self-hosted IBM Langflow OSS in the affected range are exposed. An attacker needs a valid account on the instance, and the sources do not say whether default configuration is affected. unknown whether managed or hosted Langflow services are involved.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T16:17:50+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-107327","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107327","severity":null,"published_at":"2026-10-29T16:17:50+00:00","modified_at":"2026-10-29T16:17:50+00:00","first_seen_at":"2026-10-29T16:25:55+00:00","fetched_at":"2026-10-29T16:25:55+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"}