CVE-2026-47274

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.

• CWE-427

• https://github.com/mcdope/pam_usb/commit/1ee8745920388df48d001a8e61ba629071557937
• https://github.com/mcdope/pam_usb/commit/52a1fd6413b7ffcc1a5b58ce432be42e7bf0dbd0
• https://github.com/mcdope/pam_usb/commit/993e73d8bebb1d8e62677388de3402b6ec36b600
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-pp29-w28g-r9h9

Published

May 27, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-47269pam_usb provides hardware authentication for Linux using ord…7.4
• CVE-2026-4727Denial-of-service in the Libraries component in NSS. This vu…7.5
• CVE-2026-47270pam_usb provides hardware authentication for Linux using ord…6.3
• CVE-2026-47271pam_usb provides hardware authentication for Linux using ord…5.1
• CVE-2026-47272pam_usb provides hardware authentication for Linux using ord…7.1
• CVE-2026-47273pam_usb provides hardware authentication for Linux using ord…6.5
• CVE-2026-47275In nanomq versions 0.24.11 and earlier, a NULL pointer deref…2.6
• CVE-2026-47276In nanomq versions 0.24.11 and earlier, a NULL pointer deref…6.5
• CVE-2026-47277Runtipi is a personal homeserver orchestrator. In versions 4…6.5
• CVE-2026-47279NocoDB is software for building databases as spreadsheets. P…6.9
• CVE-2026-4728Spoofing issue in the Privacy: Anti-Tracking component. This…6.5
• CVE-2026-47280Improper authentication in Azure Resource Manager (ARM) allo…9.8