{"id":"CVE-2026-107366","details":"IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. Any authenticated user can bulk-delete another user's messages, overwrite message content to inject malicious prompts, or hijack an entire conversation session by reassigning its session ID.","modified":"2026-11-05T03:29:22.061299748Z","published":"2026-10-20T00:17:25.640Z","database_specific":{},"references":[{"type":"FIX","url":"https://www.ibm.com/support/pages/node/7293016"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/langflow-ai/langflow","events":[{"introduced":"24d9e86885b877ea3e9d03cbc50b963765489721"},{"fixed":"52622284d3bbc6d2cddc7a4b0bf18b2161e4b88c"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"1.0.0"},{"fixed":"1.12.5"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107366.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"}]}