{"id":"CVE-2026-4502","aliases":["EUVD-2026-26434","GHSA-q6r8-4vgg-hrwg"],"status":"published","title":"Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API","description":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing \"dot dot\" sequences (/../) to write arbitrary files on the system.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00275,"percentile":0.20096,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-04-30T20:57:08Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"ibm","product":"langflow desktop"},{"vendor":"langflow","product":"langflow_desktop"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7271097","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4502"},{"url":"https://github.com/advisories/GHSA-q6r8-4vgg-hrwg"}],"sources":{"cve":[{"id":"CVE-2026-4502","title":"Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API","description":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing \"dot dot\" sequences (/../) to write arbitrary files on the system.","status":"published","published":"2026-04-30T20:57:08.13Z","modified":"2026-06-12T20:28:41.538Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:19:58.944663Z"}],"euvd":[{"id":"EUVD-2026-26434","description":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing \"dot dot\" sequences (/../) to write arbitrary files on the system.","status":"published","published":"2026-04-30T20:57:08Z","modified":"2026-06-12T20:28:41Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:43.222Z"}],"ghsa":[{"id":"GHSA-q6r8-4vgg-hrwg","title":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to...","description":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing \"dot dot\" sequences (/../) to write arbitrary files on the system.","status":"published","published":"2026-04-30T21:30:39Z","modified":"2026-04-30T21:30:44Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:07:52.236911Z"}],"nvd":[{"id":"CVE-2026-4502","description":"IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing \"dot dot\" sequences (/../) to write arbitrary files on the system.","status":"published","published":"2026-04-30T21:16:33.533Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:16.626888Z"}]}}