{"id":"CVE-2026-4502","state":"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.","publishedAt":"2026-04-30T20:57:08.130Z","updatedAt":"2026-06-12T20:28:41.538Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","source":"ibm"},"assigner":"ibm","products":["IBM Langflow Desktop"],"affected":[{"vendor":"IBM","product":"Langflow Desktop","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThanOrEqual":"1.8.4","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:langflow_desktop:1.2.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:langflow_desktop:1.8.4:*:*:*:*:*:*:*"]}],"references":["https://www.ibm.com/support/pages/node/7271097"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/4xxx/CVE-2026-4502.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4502","state":"PUBLISHED","datePublished":"2026-04-30T20:57:08.130Z","dateUpdated":"2026-06-12T20:28:41.538Z","assignerShortName":"ibm","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateReserved":"2026-03-20T13:47:59.369Z"},"containers":{"cna":{"title":"Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"IBM","product":"Langflow Desktop","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThanOrEqual":"1.8.4","versionType":"semver"}],"cpes":["cpe:2.3:a:ibm:langflow_desktop:1.2.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:langflow_desktop:1.8.4:*:*:*:*:*:*:*"]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7271097","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-06-12T20:28:41.538Z"},"solutions":[{"lang":"en","value":"IBM recommends addressing the vulnerability now by upgrading to IBM Langflow Desktop 1.9.0 or newer  https://www.langflow.org/blog/langflow-1-9-desktop \nIf you are already using Langflow Desktop, upgrade in the application to version 1.9.0\nTo install Langflow Desktop for the first time, visit   Langflow Desktop https://langflow.org/desktop . Download https://langflow.org/desktop","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>IBM recommends addressing the vulnerability now by upgrading to IBM Langflow Desktop 1.9.0 or newer <a href=\"https://www.langflow.org/blog/langflow-1-9-desktop\" rel=\"nofollow\">https://www.langflow.org/blog/langflow-1-9-desktop</a><br>If you are already using Langflow Desktop, upgrade in the application to version 1.9.0<br>To install Langflow Desktop for the first time, visit <a href=\"https://langflow.org/desktop\" rel=\"nofollow\">&nbsp;Langflow Desktop</a>.<a href=\"https://langflow.org/desktop\" rel=\"nofollow\">Download</a></p>"}]}],"credits":[{"lang":"en","value":"The vulnerability was reported to IBM by Akshat Sinha, Senior SRE Rubrik (https://www.linkedin.com/in/akshat-sinha-568765167).","type":"reporter"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"ibm-cvegen"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-01T14:57:03.183036Z","id":"CVE-2026-4502","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-01T14:58:10.215Z"}}]}}}