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    CVE-2025-53537

    LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.

    Published:Jul 23, 2025
    Last Modified:Aug 5, 2025
    EPS:Jul 23, 2025
    EPSS Score:0.00064
    CVSS Score:7.5

    Affected Products

    Vendor
    Oisf
    Product
    Libhtp

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2024-45797 (CVSS 7.5) — LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.…
    CVE-2024-28871 (CVSS 7.5) — LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Version 0.5.46 may pa…
    CVE-2024-23837 (CVSS 7.5) — LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time o…
    CVE-2019-17420 (CVSS 5.3) — In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error cau…
    CVE-2018-10243 (CVSS 9.8) — htp_parse_authorization_digest in htp_parsers.c in LibHTP 0.5.26 allows remote attackers to cause a heap-based…
    CVE-2015-0928 (CVSS 7.5) — libhtp 0.5.15 allows remote attackers to cause a denial of service (NULL pointer dereference).…

    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