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CVE-2026-47167 is a code injection vulnerability in Vim's cucumber filetype plugin prior to version 9.2.0496. On builds compiled with Ruby support, the plugin function s:stepmatch() reads step-definition patterns from Ruby files in a repository's Cucumber feature or story directories and incorporates those patterns into an argument to Ruby Kernel.eval without sufficient escaping. A malicious repository can therefore supply a crafted pattern that causes unintended Ruby code to be evaluated when a user invokes a step-jump mapping.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by Fedora advisory 2026-bb39640a6c affecting Fedora 46 packages; the content does not specify the technical flaw type.
An arbitrary code execution vulnerability in Vim via crafted step-definition patterns.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.