NVD Vulnerability Detail
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CVE-2026-8859
Summary

IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow an attacker to write arbitrary files to unintended locations due to improper input validation in the APIRequest component. A path traversal vulnerability exists when the "Save to File" feature is enabled, where filenames extracted from HTTP response Content-Disposition headers are not sanitized before being joined to the temporary directory path. An attacker controlling an external HTTP server can supply crafted filename values containing path traversal sequences (e.g., ../), enabling arbitrary file writes to locations accessible by the Langflow process.

Publication Date July 18, 2026, 5:17 a.m.
Registration Date July 19, 2026, 4:17 a.m.
Last Update July 21, 2026, 2:47 a.m.
CVSS3.1 : CRITICAL
スコア 9.9
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC)
攻撃に必要な特権レベル(PR)
利用者の関与(UI) 不要
影響の想定範囲(S) 変更あり
機密性への影響(C)
完全性への影響(I)
可用性への影響(A)
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* 1.0.0 1.10.1
Configuration2 or higher or less more than less than
Related information, measures and tools
Common Vulnerabilities List