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Vulnerability record · CVE-2026-43961 · published 19 August 2026

CVE-2026-43961: Code injection vulnerability

A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user running Vim.

7.8 CVSS 3.1 High EPSS 0.22% · top 88.7% CWE-94 · Code injection Awaiting Analysis
7.8CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
22 Sep 2026Last modified by NVD

Description

A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user running Vim.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:57614
https://access.redhat.com/security/cve/CVE-2026-43961
https://bugzilla.redhat.com/show_bug.cgi?id=2460434
https://github.com/vim/vim/security/advisories/GHSA-66hr-7p6x-x5j3
http://www.openwall.com/lists/oss-security/2026/05/14/7

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Source: NIST National Vulnerability Database (record CVE-2026-43961), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.