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CVE-2026-45130— Vim: Heap Buffer Overflow in spell file loading

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 9.2.0450之前版本存在安全漏洞，该漏洞源于read_compound()中的堆缓冲区溢出，可能导致攻击者利用特制拼写文件溢出堆。

CVSS 6.6 · Medium EPSS 0.20% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
vim vim < 9.2.0450 affected
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I. Basic Information for CVE-2026-45130

Vulnerability Information
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Vulnerability Title
Vim: Heap Buffer Overflow in spell file loading
Source: CVE Program / CVE List V5
Vulnerability Description
Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active. An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer multiplication, causing a small buffer to be allocated for a write loop that runs many iterations, overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has been patched in version 9.2.0450.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
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 9.2.0450之前版本存在安全漏洞，该漏洞源于read_compound()中的堆缓冲区溢出，可能导致攻击者利用特制拼写文件溢出堆。
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 < 9.2.0450 -

II. Public POCs for CVE-2026-45130

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III. Intelligence Information for CVE-2026-45130

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Patches & Fixes for CVE-2026-45130 (1)

Vendor Advisories for CVE-2026-45130 (1)

Vendor Pages for CVE-2026-45130 (1)

Same Patch Batch · vim · 2026-05-08 · 3 CVEs total

CVE-2026-42307 4.4 MEDIUM Vim: OS Command Injection in netrw
CVE-2026-44656 Vim: OS Command Injection via 'path' completion

IV. Related Vulnerabilities

Same product: vim
Same vendor: vim
Same weakness: CWE-122

V. Comments for CVE-2026-45130

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