CVE-2026-45130
Last modified
CVE-2026-45130 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Neovim | Neovim | <= 0.12.2 |
| Vim | Vim | < 9.2.0450 |
References
- https://github.com/vim/vim/security/advisories/GHSA-q4jv-r9gj-6cwvExploit, Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/14/3Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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