vim up to 9.2.275 Command Line mapset os command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in vim up to 9.2.275. The affected element is the function mapset of the component Command Line Handler. The manipulation leads to os command injection. This vulnerability is traded as CVE-2026-34982. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in vim up to 9.2.275 and classified as critical. This issue affects the function mapset of the component Command Line Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Vim is an open source, command line text editor. Prior to version 9.2.0276, a modeline sandbox bypass in Vim allows arbitrary OS command execution when a user opens a crafted file. The `complete`, `guitabtooltip` and `printheader` options are missing the `P_MLE` flag, allowing a modeline to be executed. Additionally, the `mapset()` function lacks a `check_secure()` call, allowing it to be abused from sandboxed expressions. Commit 9.2.0276 fixes the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-34982 since 03/31/2026. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 306076 (Fedora 42 : vim (2026-c718defeb6)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.2.0276 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (306076) and CERT Bund (WID-SEC-2026-0940). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Microsoft Azure Linux
• Open Source vim

Productinfo

Type

• Word Processing Software

Name

• vim

Version

• 9.2.275

License

• open-source

Website

• Product: https://github.com/vim/vim/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion