CVE-2026-86056— Notepad++: Null pointer dereference in NPPM_SAVESESSION message handler causes crash (DoS)
一分钟漏洞结论
影响对象
notepad-plus-plus notepad-plus-plus
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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 checki
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | < 8.9.8 |
affected |
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一、 漏洞 CVE-2026-86056 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Notepad++: Null pointer dereference in NPPM_SAVESESSION message handler causes crash (DoS)
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | < 8.9.8 | - |
|
二、漏洞 CVE-2026-86056 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-86056 其他参考 (4)
-
https://notepad-plus-plus.org/news/v898-released x_refsource_MISC
同批安全公告 · notepad-plus-plus · 2026-09-22 · 共 6 条
| CVE-2026-85279 | 8.6 HIGH | Notepad++: Stack Buffer Overflow in Plugin Lexer Loading via Unchecked GetLexerCount() Ret |
| CVE-2026-77605 | 7.8 HIGH | Notepad++ “Run by system” executes *.txt.cmd when user selected *.txt (target confusion → |
| CVE-2026-86054 | 7.8 HIGH | Notepad++: Stack Buffer Overflow in `NppParameters::writeSession` via overlong session pat |
| CVE-2026-85995 | 7.3 HIGH | Notepad++: Authenticode verification bypass allows modified updater execution |
| CVE-2026-85288 | 6.7 MEDIUM | Notepad++: Shortcuts.xml macro HMAC bypass still reachable via the "Run a Macro Multiple T |
IV. Related Vulnerabilities
Same product: notepad-plus-plus
-
CVE-2026-85995
Notepad++: Authenticode verification bypass allows modified -
CVE-2026-77605
Notepad++ “Run by system” executes *.txt.cmd when user selec -
CVE-2026-86054
Notepad++: Stack Buffer Overflow in `NppParameters::writeSes -
CVE-2026-85288
Notepad++: Shortcuts.xml macro HMAC bypass still reachable v -
CVE-2026-85279
Notepad++: Stack Buffer Overflow in Plugin Lexer Loading via
Same vendor: notepad-plus-plus
-
CVE-2026-85995
Notepad++: Authenticode verification bypass allows modified -
CVE-2026-77605
Notepad++ “Run by system” executes *.txt.cmd when user selec -
CVE-2026-86054
Notepad++: Stack Buffer Overflow in `NppParameters::writeSes -
CVE-2026-85288
Notepad++: Shortcuts.xml macro HMAC bypass still reachable v -
CVE-2026-85279
Notepad++: Stack Buffer Overflow in Plugin Lexer Loading via
Same weakness: CWE-476
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V. Comments for CVE-2026-86056
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