High
knowns before 0.30.0 Path Traversal via MCP doc and memory tools
knowns versions before 0.30.0 fail to validate filesystem paths in MCP tool arguments, allowing attackers to read, create, overwrite and delete files outside the project directory. Attackers can supply path arguments containing directory traversal sequences to access arbitrary Markdown files accessible to the server process.
Announced Group revision 1
Original source ↗CVE-2026-86439
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-86439
knowns
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "knowns-dev",
"product": "knowns",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.30.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "0.30.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/knowns",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-86439
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #1594 · Revision 1
- Added to Heist Feed
- Publisher date