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    CVE-2024-1455

    A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation. By nesting multiple layers of entities within an XML document, an attacker can cause the XML parser to consume excessive CPU and memory resources, leading to a denial of service (DoS).

    Published:Mar 26, 2024
    Last Modified:Jul 30, 2025
    EPS:Mar 26, 2024
    EPSS Score:0.00076
    CVSS Score:5.9

    Affected Products

    Vendor
    Langchain
    Product
    Langchain
    Vendor
    Langchain-ai
    Product
    Langchain

    Exploits

    https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-197 Exponential Data Expansion

    Related CVEs

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    CVE-2024-58340 (CVSS 8.7) — LangChain versions up to and including 0.3.1 contain a regular expression denial-of-service (ReDoS) vulnerabil…
    CVE-2025-67644 (CVSS 7.3) — LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync a…
    CVE-2025-64439 (CVSS 7.4) — LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync a…
    CVE-2025-64104 (CVSS 7.3) — LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync a…
    CVE-2025-8709 (CVSS 7.3) — A SQL injection vulnerability exists in the langchain-ai/langchain repository, specifically in the LangGraph's…
    CVE-2025-9556 (CVSS 9.8) — Langchaingo supports the use of jinja2 syntax when parsing prompts, which is in turn parsed using the gonja li…
    CVE-2025-45150 (CVSS 9.8) — Insecure permissions in LangChain-ChatGLM-Webui commit ef829 allows attackers to arbitrarily view and download…
    CVE-2025-46059 (CVSS 9.8) — langchain-ai v0.3.51 was discovered to contain an indirect prompt injection vulnerability in the GmailToolkit …

    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