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    CVE-2026-47273

    pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb builds XPath expressions from user-supplied identifiers (PAM username, service name) and device-supplied identifiers (USB device serial, model, vendor) to query /etc/pamusb.conf. These identifiers were not validated for XPath metacharacters, allowing injection of arbitrary XPath predicates. This vulnerability is fixed in 0.9.0.

    Published:May 27, 2026
    Last Modified:May 29, 2026
    EPS:May 27, 2026
    EPSS Score:0.00045
    CVSS Score:6.5

    Affected Products

    Vendor
    Mcdope
    Product
    Pam Usb

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-250 XML Injection
    CAPEC-83 XPath Injection

    Related CVEs

    CVE-2026-48980 (CVSS 6.3) — pam_usb provides hardware authentication for Linux using removable media. In versions prior to 0.9.2, getenv(…
    CVE-2026-48983 (CVSS 5.8) — pam_usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2,…
    CVE-2026-48982 (CVSS 5.8) — pam_usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2,…
    CVE-2026-48981 (CVSS 6.7) — pam_usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2,…
    CVE-2026-48985 (CVSS 5.5) — pam_usb provides hardware authentication for Linux using ordinary removable media. In versions 0.9.1 and below…
    CVE-2026-48986 (CVSS 4.7) — pam_usb provides hardware authentication for Linux using removable media. In pam_usb 0.9.1 and earlier, usb_ge…
    CVE-2026-48984 (CVSS 4.7) — pam_usb provides hardware authentication for Linux using ordinary removable media. In versions 0.9.1 and below…
    CVE-2026-44712 (CVSS 8.2) — pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, a crafted U…
    CVE-2026-44709 (CVSS 7.8) — pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pine…
    CVE-2026-44710 (CVSS 4.6) — pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/device.…

    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