SB2026051807 - Eval Injection in Vim

Description

This security bulletin contains information about 1 vulnerability.

1) Eval Injection (CVE-ID: N/A)

CWE-ID: CWE-95 - Eval Injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper neutralization of directives in dynamically evaluated code in s:stepmatch() in the cucumber filetype plugin when processing crafted step-definition regex patterns from repository .rb files during step-jump handling. A remote attacker can place a specially crafted step-definition pattern in an attacker-controlled repository to execute arbitrary code.

Exploitation requires a Vim build with +ruby support and user interaction to invoke a step-jump mapping on a matching feature line.

Remediation

Install update from vendor's website.

References

• https://github.com/vim/vim/security/advisories/GHSA-4473-94jm-w5x9
• https://github.com/vim/vim/commit/a65a52d684bc58535ad28a4ae824d22e76399934