CVE-2026-47273

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Weakness enumeration

CWE-91

Affected software

No affected versions have been published.

Timeline

Published: May 27, 2026
Last modified: Jun 17, 2026
NVD status: Deferred

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