vim security

About this tag
The vim security tag on WindowsForum.com covers a series of high-severity vulnerabilities disclosed in Vim during 2026, including CVE-2026-52858, CVE-2026-47167, CVE-2026-52859, CVE-2026-52860, CVE-2026-46483, CVE-2026-39881, CVE-2026-35177, and CVE-2026-34982. These flaws affect features such as Python omni-completion, Cucumber filetype plugins, terminal screen snapshots, tar archive handling, NetBeans integration, zip.vim path traversal, and modeline processing. The discussions emphasize that Vim, while a mature text editor, has become part of the endpoint attack surface on Windows systems, especially in developer workflows. Patches are available in Vim versions 9.2.0276 through 9.2.0597. The content highlights the need for Windows administrators and developers to treat editor security as a supply-chain concern and to upgrade promptly.

  1. CVE-2026-52858 Vim Python Completion Can Execute Import Code on Untrusted Buffers

    CVE-2026-52858 is a Vim vulnerability published in June 2026 affecting Python omni-completion before Vim 9.2.0561, where invoking completion on a hostile Python buffer can execute attacker-controlled import code with the privileges of the user running the editor. That makes this less a “remote...
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    • cve 2026 python omni-completion vim security windows developer tools
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    • Forum: Security Alerts

  2. CVE-2026-47167 Vim Code Injection: Patch Vim + Secure Cucumber Workflows

    CVE-2026-47167 is a medium-severity Vim code-injection vulnerability disclosed in June 2026 that affects Vim versions before 9.2.0496 when the bundled Cucumber filetype plugin runs on builds compiled with Ruby support and processes malicious step-definition patterns from an attacker-controlled...
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    • cucumber plugin cve 2026-47167 ruby code injection vim security
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    • Forum: Security Alerts

  3. CVE-2026-52859 Vim Terminal Crash: Fix in Vim 9.2.0565 Explained

    Microsoft’s MSRC entry for CVE-2026-52859 documents a medium-severity Vim flaw, disclosed in June 2026 and fixed in Vim 9.2.0565, where terminal screen snapshot handling can read beyond a six-character cell buffer and crash the editor. That sounds narrow, almost quaint, until you remember where...
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    • cve 2026-52859 terminal emulator vim security wsl vulnerability
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    • Forum: Security Alerts

  4. CVE-2026-52860 Vim Python Completion: Windows Devs Must Upgrade Fast

    Microsoft’s Security Update Guide now lists CVE-2026-52860, a Vim vulnerability disclosed in June 2026 that allows attacker-controlled Python code to run when a user opens a hostile Python buffer and triggers Vim’s Python omni-completion before upgrading to Vim 9.2.0597. The bug is not a Windows...
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    • cve-2026-52860 python omni-completion vim security windows developer tools
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    • Forum: Security Alerts

  5. CVE-2026-46483 Vim Tar Command Injection: Patch and Workflow Risk Guide

    CVE-2026-46483 is a Vim command-injection vulnerability disclosed in May 2026 that affects versions before 9.2.0479, where Vim’s tar archive helper can mishandle specially crafted .tgz filenames on Unix-like systems and execute shell commands in the user’s context. The flaw is not a remote worm...
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    • command injection cve-2026-46483 tar archive vim security
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    • Forum: Security Alerts

  6. CVE-2026-39881: Vim NetBeans Ex Command Injection & Why It Needs Preconditions

    Microsoft’s description of CVE-2026-39881 points to a Vim Ex command injection issue in the editor’s NetBeans integration, but the key nuance is that exploitation is not described as purely opportunistic. Instead, Microsoft says a successful attack depends on conditions beyond the attacker’s...
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    • cve 2026 39881 ex command injection netbeans integration vim security
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    • Forum: Security Alerts

  7. Vim zip.vim Path Traversal CVE-2026-35177: Conditional Exploit Risks

    Vim’s zip.vim plugin is back in the spotlight because Microsoft’s security guidance for CVE-2026-35177 describes a path traversal flaw that can be abused only when an attacker can shape conditions around the victim’s workflow, rather than triggering the bug outright at will. That distinction...

  8. CVE-2026-34982 Vim Modeline Bypass Enables Arbitrary OS Commands

    When a text editor becomes a code execution vector, the problem is no longer just a nuisance for developers; it becomes a supply-chain-style trust issue for every workstation that opens unvetted files. CVE-2026-34982 is a Vim modeline bypass that affects Vim versions earlier than 9.2.0276, and...
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    • cve-2026-34982 endpoint hardening modeline bypass vim security
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    • Forum: Security Alerts

  9. Vim 9.2.0078 Patch Fixes Statusline Stack Buffer Overflow

    Vim received a security patch on February 27, 2026 that fixes a stack-based buffer overflow in the statusline renderer: a flaw in build_stl_str_hl() could allow a large multi‑byte fill character to write past a fixed 4096‑byte stack buffer when a terminal is extremely wide, and the issue is...