CVE-2026-45759

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    CVE-2026-45759

    Published: 10 Sept 2026Last Modified: 11 Sept 2026

    Summary: Suricata http1: quadratic Content-Disposition processing can lead to denial of service

    Details: Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata could repeatedly perform expensive parsing of large HTTP `Content-Disposition` headers during HTTP response body processing. Crafted HTTP traffic could cause excessive CPU usage and denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, use a rule like `alert http1 any any -> any any (sid: 1; http.request_header; content: "Content-Disposition:"; startswith; bsize: > 8192; bypass;)`.

    References: https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45759.json, https://github.com/OISF/suricata/security/advisories/GHSA-cfq5-g2v5-6652, https://nvd.nist.gov/vuln/detail/CVE-2026-45759, https://redmine.openinfosecfoundation.org/issues/8529

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -534864353e8d6e5d50991546f96e33f547879aec

    Affected versions

    suricata-8.0.4
    suricata-8.0.3
    suricata-8.0.2
    suricata-8.0.1
    suricata-8.0.0

    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
    CVE-2026-45759 | CVE-DB