CVE-2026-26269

low-risk
Published 2026-02-13

Vim is an open source, command line text editor. Prior to 9.1.2148, a stack buffer overflow vulnerability exists in Vim's NetBeans integration when processing the specialKeys command, affecting Vim builds that enable and use the NetBeans feature. The Stack buffer overflow exists in special_keys() (in src/netbeans.c). The while (*tok) loop writes two bytes per iteration into a 64-byte stack buffer (keybuf) with no bounds check. A malicious NetBeans server can overflow keybuf with a single specialKeys command. The issue has been fixed as of Vim patch v9.1.2148.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Vim

Affected Vendors

Vim

References (4)

Patch https://github.com/vim/vim/commit/c5f312aad8e4179e437f81ad39a860cd0ef11970
Release Notes https://github.com/vim/vim/releases/tag/v9.1.2148
Patch https://github.com/vim/vim/security/advisories/GHSA-9w5c-hwr9-hc68
Mailing List http://www.openwall.com/lists/oss-security/2026/02/13/2
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal