CVE Explorer

CVE-2026-47273

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1ca6dc898a48f8c4f291a5b0cf54af2c746f73b1aab5263a15d40e47fc620740

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pam_usb","vendor":"mcdope","versions":[{"status":"affected","version":"< 0.9.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-91","description":"CWE-91: XML Injection (aka Blind XPath Injection)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/commit/721fed08a3596cb5b4671ad702f8fdc12dcc7420"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/references/2

{"name":"https://github.com/mcdope/pam_usb/pull/311","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/pull/311"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/references/1

{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-vfj3-5h5v-6g93","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-vfj3-5h5v-6g93"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0de32b39b5aa6a7e788474443ccaef15151a63561bfe52a1db05a3e40913da4f · sha256:851804e29cd68d76… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer