CVE-2026-54672

Local code execution via empty library path

Published Jun 30, 2026 · Updated Jun 30, 2026

Uncontrolled search path handling in Electron Userland app-builder-lib and electron-builder before 26.15.0 allows local users to execute code. Two AppImage construction paths generate an AppRun script that can prepend an empty component to LD_LIBRARY_PATH, making the launch directory part of the loader search path. Exploitation requires write access to that directory and execution of the AppImage from it; a planted shared library then loads with the launching user's privileges.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled search path handling in Electron Userland app-builder-lib and electron-builder before 26.15.0 allows local users to execute code. Two AppImage construction paths generate an AppRun script that can prepend an empty component to LD_LIBRARY_PATH, making the launch directory part of the loader search path. Exploitation requires write access to that directory and execution of the AppImage from it; a planted shared library then loads with the launching user's privileges.

The record

CVE
CVE-2026-54672
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Electron Userland
Product
app-builder-lib
Classifications
CWE-427, T1574.006
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.15.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Electron Userland · app-builder-libversion=< 26.15.0
Electron Userland · electron-builderversion=< 26.15.0

Published CVSS scores

7.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.006Dynamic Linker Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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