Notepad++: Shortcuts.xml macro HMAC bypass still reachable via the "Run a Macro Multiple Times" dialog

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85288
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 18:17:23 UTC
Updated2026-09-23 18:28:25 UTC
DescriptionNotepad++ 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.

Risk And Classification

Primary CVSS: v3.1 6.7 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.001210000 probability, percentile 0.021900000 (date 2026-09-23)

Problem Types: CWE-78 | CWE-345 | CWE-693 | CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-693 CWE-693: Protection Mechanism Failure

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED6.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Notepad-plus-plus Notepad-plus-plus affected < 8.9.8 Not specified

References

ReferenceSourceLinkTags
notepad-plus-plus.org/news/v898-released [email protected] notepad-plus-plus.org
github.com/notepad-plus-plus/notepad-plus-plus/commit/4cd74cb9347b9c6caa... [email protected] github.com
github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-... [email protected] github.com
github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8 [email protected] github.com
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