CVE-2026-52886

mediumpriority · track · 10EPSS 0.002 · 6 %ileexploit · PoCDEEU

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.17% (6th) EPSS

CVSS 5.1 · medium

Is it mine?

3 products

Check your exposure

Who says so?

2 sources

enisa_euvd · cert_bund

EPSS · scored 2026-10-27

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, Notepad++ validates the backupFilePath attribute from session.xml with std::wstring::starts_with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode restoration to read an arbitrary user-readable file outside the backup directory into an editor tab. This issue is fixed in version 8.9.7.

cvss

Technical severity, 0–10. One row per scoring source.

5.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.2–5.1

v4.05.1mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.05.1mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · security-advisories@github.com

v4.03.2lowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US

exploits (1)

Public proof-of-concept and weaponised exploit code.

v3s9er/CVE-2026-52886Notepad++ CVE-2026-52886 — session.xml backupFilePath starts_with() path traversal (GHSA-rqfm-pw34-r7j6)PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

Open Source Notepad++ <8.9.7all versionscert_bundDE
Open Source Notepad++< 8.9.7cert_bundDE
notepad-plus-plus notepad-plus-plus≤ < 8.9.7enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2312Notepad++: Mehrere SchwachstellenDeutsch2026-07-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Notepad++ ausnutzen, um beliebigen Programmcode auszuführen, um Informationen offenzulegen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.

also known as (1)

Other names and identifiers for this entity.

EUVD-2026-60374 enisa_euvd

sources

Which sources assert this record, and when.

enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-08-17modified 2026-08-18

references (6)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan