CVE-2026-52884
Notepad++: CVE-2026-48800 Bypass
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.
INFO
Published Date :
June 26, 2026, 9:16 p.m.
Last Modified :
June 29, 2026, 9:22 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Notepad++ to version 8.9.6.2.
- Apply the patch provided by the vendor.
- Ensure the isInTrustedDirectory() validation is active.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52884.
| URL | Resource |
|---|---|
| https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4 | Patch |
| https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6 | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52884 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52884
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52884 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52884 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 29, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:notepad-plus-plus:notepad++:8.9.6.1:*:*:*:*:*:*:* Added Reference Type GitHub, Inc.: https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6 Types: Exploit, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 29, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-52884', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-29T12:10:33.378787Z'} -
New CVE Received by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'notepad-plus-plus', 'product': 'notepad-plus-plus', 'versions': [{'status': 'affected', 'version': '= 8.9.6.1'}]}] Added 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-42 Added Reference https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4 Added Reference https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6