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    CVE-2026-42048

    Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (DELETE /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are concatenated directly into file paths without proper sanitization or boundary validation. An authenticated attacker can exploit this flaw to delete arbitrary directories anywhere on the server's filesystem, leading to data loss and potential service disruption. This vulnerability is fixed in 1.9.0.

    Published:May 12, 2026
    Last Modified:May 14, 2026
    EPS:May 12, 2026
    EPSS Score:0.00041
    CVSS Score:9.6

    Affected Products

    Vendor
    Langflow
    Product
    Langflow

    Exploits

    https://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68qhttps://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68qhttps://github.com/EQSTLab/CVE-2026-42048

    Related CVEs

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    CVE-2026-17621 (CVSS 5.4) — IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote attacker to traverse directories on the system. An …
    CVE-2026-17622 (CVSS 6.5) — IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive informat…
    CVE-2026-17631 (CVSS 5) — IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive informat…
    CVE-2026-19298 (CVSS 8.8) — IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to execute arbitrary code du…
    CVE-2026-19301 (CVSS 5) — IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive informat…
    CVE-2026-19303 (CVSS 8.1) — IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to delete arbitrary local fi…
    CVE-2026-19300 (CVSS 7.5) — IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote attacker to obtain sensitive information due to inc…
    CVE-2026-19299 (CVSS 6.5) — IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive informat…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High