CVE-2026-86056: Notepad++: Null pointer dereference in NPPM_SAVESESSION message handler causes crash (DoS)
Affected: notepad-plus-plus · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 5% of scored CVEs
DescriptionCVE.org
Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the NPPM_SAVESESSION handler in PowerEditor/src/NppBigSwitch.cpp converts lParam to a sessionInfo pointer and dereferences its nbFile, files, and sessionFilePathName members without checking for null. A process running at the same or a higher Windows integrity level on the same desktop can send NPPM_SAVESESSION with a null lParam, immediately terminating Notepad++ and causing denial of service and loss of unsaved documents. This issue is fixed in version 8.9.8.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- notepad-plus-plus · notepad-plus-plus< 8.9.8
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- notepad-plus-plus
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-86056 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-476cwe.mitre.org
- github.com/notepad-plus-plus/notepad-plus-plus/security/advisorigithub.com
- github.com/notepad-plus-plus/notepad-plus-plus/commit/8b33f52e7agithub.com
- github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9github.com
- notepad-plus-plus.org/news/v898-releasednotepad-plus-plus.org