Home/CVE/Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists
CVE

CVE-2026-25749

Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists

Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c.

When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.

MEDIUM · CVSS 6.6 EPSS 6e-05
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-122Heap-based Buffer Overflow
▤

Affected Products & Versions

1
vim< 9.1.2132
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-5w93-4g67-mm43github.com
▣

Scoring & Timeline

6.6
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Feb 2026 · 11:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

28
rhsaRHSA-2026:16009Moderate
rhsaRHSA-2026:16008Moderate
rhsaRHSA-2026:14773Important
rhsaRHSA-2026:15087Important
rhsaRHSA-2026:16174Important
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/vim/vim/commit/0714b15940b245108e6e9d7aa2260dd849a26fa9Patch
https://github.com/vim/vim/releases/tag/v9.1.2132Product
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