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CVE-2026-52884

Notepad++: CVE-2026-48800 Bypass

Published: Jun 26, 2026Updated: Jun 29, 2026 Sources: CVE List NVD BDUCWE-42
7.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 88.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExecute(). This function checks whether the resolved executable path is under a trusted directory. This vulnerability is fixed in 8.9.6.2.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-42

Affected Products

notepad-plus-plus
commercialaka notepad plus plus, notepad+ plus, notepad++
notepad-plus-plusOn-prem
Consumer Software / productivity
notepad\+\+On-prem
Consumer Software / productivity
Don Ho
commercial
Notepad++Mixed
Consumer Software / file-utility

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-52884?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6
github.com
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4
github.com
https://news.ycombinator.com/item?id=48473731
news.ycombinator.com

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