Is CVE-2026-47269 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-47269 being exploited in the wild.

How severe is CVE-2026-47269?

High severity, with a CVSS score of 7.4, published 27 May 2026.

Is there a fix for CVE-2026-47269?

A patch was published on 2026-05-27: Fixed in version 0.9.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-47269 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-47269?

Check whether you run Mcdope Pam Usb at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-47269: mcdope pam_usb access control bypass in deny_remote

CVE-2026-47269 · Severity: high · CVSS 7.4 · Published 2026-05-27

pam_usb is a tool that allows users to log into Linux systems using a physical USB drive as a security key. A flaw in its remote-access protection allows attackers to bypass security restrictions when connecting over a network via SSH. If an attacker has physical access to a registered USB device, they can use it to log into a remote server even if the system is configured to block remote USB authentication, potentially leading to unauthorized access to sensitive data and systems.

Technologies: Mcdope Pam Usb. Vendors: Mcdope.

Quick answers

Is CVE-2026-47269 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-47269 being exploited in the wild.
How severe is CVE-2026-47269?: High severity, with a CVSS score of 7.4, published 27 May 2026.
Which products and versions are affected?: Mcdope Pam Usb < 0.9.0.
Is there a fix for CVE-2026-47269?: A patch was published on 2026-05-27: Fixed in version 0.9.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-47269 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-47269?: Check whether you run Mcdope Pam Usb at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability exists in pam_usb's 'deny_remote' feature due to an incomplete check of the utmpx ut_addr_v6 field. The software originally only validated the first 32-bit word of the 128-bit IPv6 address field to detect remote sessions. Because IPv4-mapped IPv6 addresses (::ffff:x.x.x.x) store the address data in the final word and leave the first word as zero, remote connections on systems using IPv6 wildcards (common in Debian/Ubuntu SSH configurations) are misclassified as local. An attacker with physical access to a registered USB device can exploit this to authenticate via SSH, bypassing the intended remote-access block. This issue is resolved in version 0.9.0 by ensuring all four words of the address field are checked.

Affected products

mcdope pam_usb < 0.9.0

Timeline

2026-05-20: advisory: GitHub Security Advisory published
2026-05-27: disclosed: CVE-2026-47269 published to NVD
2026-05-27: patched: Fixed in version 0.9.0

References

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