Medium 6.6Published May 8, 2026

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

Updated under an hour ago (Oct 26, 2026, 7:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 6.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Weakness (CWE): CWE-122, CWE-190
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: May 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vim vim vim:vim (from the name)	before 9.2.0450	CNA record
neovim neovim neovim:neovim	through 0.12.2	NVD
vim vim vim:vim	before 9.2.0450	NVD

References

References

https://github.com/vim/vim/security/advisories/GHSA-q4jv-r9gj-6cwv	x-refsource-confirm, exploit, patch, vendor-advisory
https://github.com/vim/vim/commit/92993329178cb1f72d700fff45ca86e1c2d369f8	x-refsource-misc, patch
https://github.com/vim/vim/releases/tag/v9.2.0450	x-refsource-misc, product
http://www.openwall.com/lists/oss-security/2026/05/14/3	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.