CVE-2026-47273
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductMcdope Pam Usb
PublishedMay 27, 2026
First seenMay 27, 2026
Weakness typeCWE-91CWE-91
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mcdope pam_usb | < 0.9.0 | — |
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