CVE-2026-52886: medium-severity vulnerability in notepad-plus-plus
Notepad++: session.xml backupFilePath starts_with Bypass
Published · Updated
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.1epss 0.2%
from disclosure to weapon0 days
Published on NVDAug 17
1st PoCAug 6
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
notepad-plus-plus · notepad-plus-pluspublic PoCs found — 1
githubgithub.com/v3s9er/CVE-2026-52886★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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