High severity · published Jun 26, 2026
CVE-2026-52884
Notepad++: CVE-2026-48800 Bypass
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
notepad-plus-plus · notepad-plus-plus
= 8.9.6.1 · source: vendor
NO
Notepad++ · Notepad-plus-plus
8.9.6.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-52884
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-52884
Patch
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4
Exploit
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6
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