{"cve":"CVE-2026-86540","nvd":{"published":"2026-09-07T23:16:53.723","modified":"2026-09-08T19:56:50.950","status":"Deferred","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.","cvss_v4":{"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","score":8.5},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-78"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-86540","score":0.00212,"percentile":0.11534,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-mc52-mwq4-vfx3","url":"https://osv.dev/vulnerability/GHSA-mc52-mwq4-vfx3","summary":"knowns OS Command Injection via Insecure LSP Binary Path Config in .knowns/config.json","modified":"2026-10-06T19:15:03.494654433Z","packages":[{"ecosystem":"npm","name":"knowns","purl":"pkg:npm/knowns","ranges":["<0.30.0"],"fixed":["0.30.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}