CVE-2026-47273

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Source
https://cve.org/CVERecord?id=CVE-2026-47273
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47273.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-47273
Aliases
  • GHSA-vfj3-5h5v-6g93
Published
2026-05-27T20:03:39Z
Modified
2026-08-12T16:09:40Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N CVSS Calculator
Summary
pam_usb: XPath injection via PAM-supplied identifiers in pam_usb configuration queries
Details

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb builds XPath expressions from user-supplied identifiers (PAM username, service name) and device-supplied identifiers (USB device serial, model, vendor) to query /etc/pamusb.conf. These identifiers were not validated for XPath metacharacters, allowing injection of arbitrary XPath predicates. This vulnerability is fixed in 0.9.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-91"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47273.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
721fed08a3596cb5b4671ad702f8fdc12dcc7420
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.9.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.5.0
0.7.1
0.7.2
0.7.3
0.8.3
0.8.4
0.8.7
v0.*
v0.7.0
v0.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47273.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "310671743499104942899270600637756684978",
            "length": 3256
        },
        "id": "CVE-2026-47273-298ef5f8",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "src/conf.c",
            "function": "pusb_conf_parse"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "270339150120948850787340306911047059359",
            "length": 983
        },
        "id": "CVE-2026-47273-2b5b8797",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
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            "function": "pusb_conf_parse_options"
        }
    },
    {
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        "digest": {
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-47273-4312013f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "src/conf.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-47273-51f9deb6",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "src/conf.h"
        }
    },
    {
        "deprecated": false,
        "digest": {
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            "length": 706
        },
        "id": "CVE-2026-47273-7ecbc5de",
        "signature_type": "Function",
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        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "src/conf.c",
            "function": "pusb_conf_parse_device"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-47273-98e61752",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "tests/unit/c/conf_test.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
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            "length": 747
        },
        "id": "CVE-2026-47273-edda70a9",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420",
        "target": {
            "file": "tests/unit/c/conf_test.c",
            "function": "main"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:09:40Z"