CVE-2026-47274mediumCWE-427

CVE-2026-47274: medium-severity vulnerability in mcdope pam_usb

pam_usb: Uncontrolled search path in pam_usb tools allows privilege escalation via PATH manipulation

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.3epss 0.1%
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, multiple pam_usb helper tools resolved external binaries through the PATH environment variable rather than using absolute paths. An attacker who can influence the process environment during PAM authentication or tool execution could substitute malicious binaries. The affected tools are pamusb-check (src/tmux.c), pamusb-conf (tools/pamusb-conf), and pamusb-keyring-unlock-gnome (tools/pamusb-keyring-unlock-gnome). This vulnerability is fixed in 0.9.0.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected products
mcdope · pam_usb
Related CVEs — mcdope pam_usb

In the same product, most dangerous first.

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