CVE-2026-44709
HIGHCVSS v3.1: 7.8 · EPSS: 0.0002 (6.8 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.8 v3.1 · NVD
- EPSS
- 0.0002 (6.8 percentile) · FIRST.org
- CISA KEV
- No
- Type
- OS Command Injection · NVD CWE
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Published
- 2026-05-27 · Modified: 2026-06-02
- References
- Jump to references (1)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pinentry reads the PINENTRY_FALLBACK_APP environment variable and executes it directly without any validation. Any process that can set environment variables before pamusb-pinentry is invoked can point PINENTRY_FALLBACK_APP at an arbitrary binary or script and have it executed with the privileges of the pam_usb tool chain. This vulnerability is fixed in 0.8.7.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.