CVE-2026-86540
- Source
- https://cve.org/CVERecord?id=CVE-2026-86540
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86540.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-86540
- Aliases
- Published
- 2026-09-07T23:03:18Z
- Modified
- 2026-10-28T02:30:49Z
- Severity
-
- 8.5 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- knowns before 0.30.0 Arbitrary Code Execution via LSP Binary
- Details
-
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.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-78" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86540.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86540.json
- https://github.com/knowns-dev/knowns/releases/tag/v0.30.0
- https://github.com/knowns-dev/knowns/security/advisories/GHSA-mc52-mwq4-vfx3
- https://nvd.nist.gov/vuln/detail/CVE-2026-86540
- https://www.vulncheck.com/advisories/knowns-before-0.30.0-arbitrary-code-execution-via-lsp-binary
- https://github.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396
- 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
Affected packages
Git / github.com/knowns-dev/knowns
Affected ranges
- Type
- GIT
- Repo
- https://github.com/knowns-dev/knowns
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "0.30.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "d3989829fb5095666d23d005b2f78a082832a396" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v0.30.0", "range": [ { "fixed": "cead30b2c3a34f66c0c40cb692ed51e588e63bd7" } ], "source": "REFERENCES_TAG" } ] }
Affected versions
v0.*
v0.1.1
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.10.4
v0.10.5
v0.10.6
v0.11.0
v0.11.1
v0.11.2
v0.11.3
v0.11.4
v0.12.0
v0.12.1
v0.12.2
v0.12.3
v0.12.4
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.16.0
v0.16.1
v0.16.2
v0.16.3
v0.17.0
v0.17.1
v0.18.0
v0.18.1
v0.18.2
v0.18.3
v0.18.4
v0.19.0
v0.19.1
v0.19.2
v0.2.0
v0.2.1
v0.20.0
v0.20.1
v0.20.2
v0.20.3
v0.20.4
v0.20.5
v0.21.0
v0.22.0
v0.22.1
v0.22.2
v0.23.0
v0.24.0
v0.24.1
v0.25.0
v0.26.0
v0.27.0
v0.27.1
v0.28.0
v0.29.0
v0.29.1
v0.3.0
v0.3.1
v0.4.0
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5
v0.8.6
v0.8.7
v0.8.8
v0.8.9
v0.9.0