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    CVE-2025-6853

    A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. The manipulation of the argument flag leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

    Published:Jun 29, 2025
    Last Modified:Sep 16, 2025
    EPS:Jun 29, 2025
    EPSS Score:0.00081
    CVSS Score:6.3

    Affected Products

    Vendor
    Chatchat-space
    Product
    Langchain-chatchat

    Exploits

    https://github.com/chatchat-space/Langchain-Chatchat/issues/5352https://github.com/chatchat-space/Langchain-Chatchat/issues/5352

    Related CVEs

    CVE-2026-7847 (CVSS 1.2) — A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. The affected element is the func…
    CVE-2026-7846 (CVSS 1.2) — A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. Impacted is the function fi…
    CVE-2026-7845 (CVSS 1.2) — A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.…
    CVE-2026-7844 (CVSS 2.1) — A vulnerability was detected in chatchat-space Langchain-Chatchat up to 0.3.1.3. This vulnerability affects th…
    CVE-2025-6855 (CVSS 2) — A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0…
    CVE-2025-6854 (CVSS 2.1) — A vulnerability classified as problematic was found in chatchat-space Langchain-Chatchat up to 0.3.1. This vul…

    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