CVE-2026-44709

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Source
https://cve.org/CVERecord?id=CVE-2026-44709
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44709.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44709
Aliases
  • GHSA-jxrj-q67x-wr4c
Published
2026-05-27T20:20:52Z
Modified
2026-08-12T16:24:30Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
pam_usb: PINENTRY_FALLBACK_APP environment variable allows arbitrary command execution
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44709.json"
}
References

Affected packages

Git / github.com/mcdope/pam_usb

Affected ranges

Type
GIT
Repo
https://github.com/mcdope/pam_usb
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
987f4f6ddf0a8c75ddd5f05b19b863220efe9005
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.7"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

0.*
0.5.0
0.7.1
0.7.2
0.7.3
0.8.3
0.8.4
v0.*
v0.7.0
v0.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44709.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "274006941693340921109215064742773008771"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-44709-9a35920a",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/987f4f6ddf0a8c75ddd5f05b19b863220efe9005",
        "target": {
            "file": "src/version.h"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:24:30Z"