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CVE-2026-28419— Vim has Heap-based Buffer Underflow in Emacs tags parsing

Quick assessment

Affected
vim vim
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vim是Vim开源的一款跨平台的文本编辑器。 Vim 9.2.0075之前版本存在安全漏洞，该漏洞源于Emacs风格标签文件解析逻辑存在基于堆的缓冲区下溢，可能导致处理行首包含分隔符的畸形标签文件时读取分配缓冲区之前的内存。

CVSS 5.3 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-28419

Vulnerability Information
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Vulnerability Title
Vim has Heap-based Buffer Underflow in Emacs tags parsing
Source: CVE Program / CVE List V5
Vulnerability Description
Vim is an open source, command line text editor. Prior to version 9.2.0075, a heap-based buffer underflow exists in Vim's Emacs-style tags file parsing logic. When processing a malformed tags file where a delimiter appears at the start of a line, Vim attempts to read memory immediately preceding the allocated buffer. Version 9.2.0075 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区下溢
Source: CVE Program / CVE List V5
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 9.2.0075之前版本存在安全漏洞，该漏洞源于Emacs风格标签文件解析逻辑存在基于堆的缓冲区下溢，可能导致处理行首包含分隔符的畸形标签文件时读取分配缓冲区之前的内存。
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

Vendor Product Affected Versions CPE Subscribe
vim vim < 9.2.0075 -

II. Public POCs for CVE-2026-28419

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III. Intelligence Information for CVE-2026-28419

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Vendor Advisories for CVE-2026-28419 (1)

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-2026-28420 4.4 MEDIUM Vim has Heap-based Buffer Overflow and OOB Read in :terminal
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
Same vendor: vim
Same weakness: CWE-124

V. Comments for CVE-2026-28419

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