CVE-2026-28420— Vim has Heap-based Buffer Overflow and OOB Read in :terminal
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I. Basic Information for CVE-2026-28420
Vulnerability Information
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Vulnerability Title
Vim has Heap-based Buffer Overflow and OOB Read in :terminal
Source: NVD (National Vulnerability Database)
Vulnerability Description
Vim is an open source, command line text editor. Prior to version 9.2.0076, a heap-based buffer overflow WRITE and an out-of-bounds READ exist in Vim's terminal emulator when processing maximum combining characters from Unicode supplementary planes. Version 9.2.0076 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Vim 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vim是Vim开源的一款跨平台的文本编辑器。 Vim 9.2.0076之前版本存在安全漏洞，该漏洞源于终端模拟器处理Unicode补充平面最大组合字符时存在基于堆的缓冲区溢出写入和越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-28420
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Same Patch Batch · vim · 2026-02-27 · 6 CVEs total
| CVE-2026-28421 | 5.3 MEDIUM | Vim has a heap-buffer-overflow and a segmentation fault |
| CVE-2026-28419 | 5.3 MEDIUM | Vim has Heap-based Buffer Underflow in Emacs tags parsing |
| CVE-2026-28418 | 4.4 MEDIUM | Vim has Heap-based Buffer Overflow in Emacs tags parsing |
| CVE-2026-28417 | 4.4 MEDIUM | Vim has OS Command Injection in netrw |
| CVE-2026-28422 | 2.2 LOW | Vim has stack-buffer-overflow in build_stl_str_hl() |
IV. Related Vulnerabilities
Same product: vim
- CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading - CVE-2026-44656
Vim: OS Command Injection via 'path' completion - CVE-2026-42307
Vim: OS Command Injection in netrw - CVE-2026-41411
Vim: Command injection via backtick expansion in tag filenam - CVE-2026-39881
Vim Ex command injection in Vims NetBeans integration
Same vendor: vim
- CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading - CVE-2026-44656
Vim: OS Command Injection via 'path' completion - CVE-2026-42307
Vim: OS Command Injection in netrw - CVE-2026-41411
Vim: Command injection via backtick expansion in tag filenam - CVE-2026-39881
Vim Ex command injection in Vims NetBeans integration
Same weakness: CWE-122
- CVE-2026-8261
Squirrel sqobject.cpp Load heap-based overflow - CVE-2026-8213
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow - CVE-2026-8212
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
V. Comments for CVE-2026-28420
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