CVE catalog
CVE-2026-5525
A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trail
- Severity
- Medium · CVSS 6
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN).
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | notepad\+\+ | Not reported | Not reported | unknown |
| Cpe | notepad\+\+ | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0]
- [https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921]
- [https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5525]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1059.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]