CVE-2026-85288CWE-345CWE-693CWE-78command-injection

CVE-2026-85288

Medium · published September 22, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
2.7
In the wild
Unconfirmed
What it is

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ incompletely enforces shortcuts.xml HMAC validation because WM_MACRODLGRUNMACRO, the Run a Macro Multiple Times entry point, calls macroPlayback() without the validation used by command(). A tampered shortcuts.xml macro that is blocked through the Macro menu or a shortcut key can therefore execute through the multi-run dialog and invoke internal Notepad++ commands, including commands that launch external programs, in the current user context. This issue is fixed in version 8.9.8.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00136 · 2.7th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-693 · Protection Mechanism Failure; CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-09-22T22:17Z
References (5)
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4cd74cb9347b9c6caaab17d999e24fc9ed228ff7 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8 · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-759j-g8j4-867p · [email protected]https://notepad-plus-plus.org/news/v898-released · [email protected]https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-759j-g8j4-867p · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 22 SEP 17:11Z
    Notepad++: Shortcuts.xml macro HMAC bypass still reachable via the "Run a Macro Multiple Times" dialog
    cvelistv5