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VulnerabilityPublished

CVE-2026-47273: mcdope pam_usb · XML Injection

Affects mcdope pam_usbSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 0.9.0 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.9.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade pam_usb and mcdope/pam_usb to 0.9.0.

Affected software

ProductAffectedFixed in
mcdopepam_usbAffected
  • <0.9.0
Fixed in
  • 0.9.0
GitHubmcdope/pam_usbpkg:github/mcdope/pam_usbOther threatsAffected
  • <0.9.0
Fixed in
  • 0.9.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade pam_usb to version 0.9.0 or later, where this XML Injection vulnerability is fixed. Patch status is not explicitly confirmed beyond the version fix note; check vendor sources for current remediation guidance.

Description

pam_usb versions prior to 0.9.0 are vulnerable to an XML Injection (Blind XPath Injection) due to improper validation of user- and device-supplied identifiers used in XPath queries against /etc/pamusb.conf. This allows injection of arbitrary XPath predicates. The vulnerability is fixed in version 0.9.0. The CVSS score is 6.5, indicating a medium severity issue.

References

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