{"id":"CVE-2026-86540","revision":"acb8245ebbd64f9e8b3d200faa93b60d","records":[{"revision":"acb8245ebbd64f9e8b3d200faa93b60d","observedAt":"2026-10-25T16:19:16.24+00:00","statement":{"source":"nvd","id":"CVE-2026-86540","aliases":[],"title":"knowns versions before 0.30.0 fail to validate the settings.lsp.languages binary field in project configuration files, allowing attackers to execute arbitrary binaries by crafting a malicious .knowns/config.json file. When a repository with…","description":"knowns versions before 0.30.0 fail to validate the settings.lsp.languages binary field in project configuration files, allowing attackers to execute arbitrary binaries by crafting a malicious .knowns/config.json file. When a repository with a crafted configuration is opened, the unvalidated binary path is executed twice under the user's account without any verification.","state":0,"publishedAt":"2026-09-07T23:16:53.723+00:00","modifiedAt":"2026-09-08T19:56:50.95+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.5,"severity":"HIGH"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/lsp/detect.go#L128-L157","https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/models/config.go#L205-L216","https://github.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396","https://github.com/knowns-dev/knowns/releases/tag/v0.30.0","https://github.com/knowns-dev/knowns/security/advisories/GHSA-mc52-mwq4-vfx3","https://www.vulncheck.com/advisories/knowns-before-0.30.0-arbitrary-code-execution-via-lsp-binary"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86540","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-78"],"productCriteria":[],"sourceDates":{"published":"2026-09-07T23:16:53.723","lastModified":"2026-09-08T19:56:50.950"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-86540","identifiers":["CVE-2026-86540"]},"retained":false,"historicalAffected":[]}],"coverage":[]}