CVE-2026-125742 · Package
NO FIX YET · SEE WHAT TO DO
7-Zip contains a heap out-of-bounds write in its LZX decoder that a crafted multi-volume CAB archive can trigger. An attacker who gets a victim to extract that archive can corrupt memory and execute arbitrary code.
first public Nov 10, 2026 · 1 source
Could this affect your app?
Free first check from your website. Connect your repo for the full answer.
Anyone who extracts multi-volume CAB archives with a 7-Zip build older than 26.06. Exposure needs a user to open a crafted archive, so systems that never extract untrusted CAB files are at lower risk.
Not affected if 7-zip-26.06-or-later, no-cab-extraction
Who cares 7-zip, desktop, windows
7z i) and compare it with the fixed version below..cab multi-volume archives from untrusted sources in download or extraction folders.26.06 or later.7-Zip before 26.06 contains a heap out-of-bounds write vulnerability in the LZX decoder that lets attackers corrupt memory when a continuation CAB volume declares a smaller window. Attackers can entice victims to extract crafted multi-volume CAB archives, where a stale _pos value bypasses bounds checks, enabling arbitrary code execution.
This page as .md · .json · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Check it with your coding agent
It reads this page and tells you if your code is affected.
Are you affected?
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.