CVE-2026-44713

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Source
https://cve.org/CVERecord?id=CVE-2026-44713
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44713.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44713
Aliases
  • GHSA-822m-whrh-vrj8
Published
2026-05-27T20:13:13.193Z
Modified
2026-07-15T20:54:37.180983Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
pam_usb: Command injection via $TMUX environment variable leads to RCE as root
Details

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/tmux.c reads the user's $TMUX environment variable, splits it on commas, and interpolates the socket-path component directly into a shell command passed to popen(). Because the value is placed inside double-quotes without sanitisation, any value containing " terminates the quoted string and injects arbitrary shell syntax. popen() runs as root inside the PAM stack. This vulnerability is fixed in 0.8.7.

Database specific 
{
    "cwe_ids": [
        "CWE-116",
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44713.json",
    "cna_assigner": "GitHub_M"
}
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 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.7"
        }
    ]
}

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

vanir_signatures_modified 
"2026-07-15T20:54:37Z"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "target": {
            "file": "src/version.h"
        },
        "deprecated": false,
        "source": "https://github.com/mcdope/pam_usb/commit/987f4f6ddf0a8c75ddd5f05b19b863220efe9005",
        "id": "CVE-2026-44713-9a35920a",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "274006941693340921109215064742773008771"
            ],
            "threshold": 0.9
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44713.json"