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    CVE-2026-92387

    By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle.

    Published:Oct 14, 2026
    Last Modified:Oct 20, 2026
    EPS:Oct 20, 2026
    EPSS Score:
    CVSS Score:3.7

    Affected Products

    Vendor
    Curl
    Product
    Curl

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-87863 (CVSS 3.7) — An authenticated HTTPS origin can supply an HSTS `max-age` value that the parser accepts, but time serializati…
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    CVE-2026-87865 (CVSS 3.7) — When libcurl uses libssh2 with a hashed `known_hosts` file, an unrelated initial entry can cause host key vali…
    CVE-2026-87864 (CVSS 3.7) — Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in the `IMAP APPEND {N}` literal whi…
    CVE-2026-87862 (CVSS 3.7) — Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child.…
    CVE-2026-87861 (CVSS 3.7) — When using ambient user credentials, an HTTP request directed to one origin may be dispatched over a connectio…
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    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