knowns before 0.30.0 Path Traversal via templateFile parameter
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
knowns versions before 0.30.0 contain a path traversal vulnerability in the POST /api/templates/preview endpoint that allows unauthenticated attackers to read arbitrary files. Attackers can supply directory traversal sequences in the templateFile parameter to bypass path restrictions and read sensitive files like credentials and configuration through the JSON response.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| knowns-dev | knowns | before 0.30.0 | 0.30.0 | Patch available | CNA |
- knowns Vendorknowns-dev Affected before 0.30.0 Fixed in 0.30.0 Patch available CNA
Remediation
- Fix · CNA knowns (knowns-dev) Fixed in 0.30.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
knowns-dev knowns 0.30.0
7 records Highest priority Priority HIGH 1 HIGH, 5 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-59217 knowns before 0.30.0 Arbitrary Code Execution via LSP BinaryPriority HIGH 72
- TI-2026-59220 knowns before 0.30.0 Unauthenticated Management API ExposurePriority MEDIUM 50
- TI-2026-59219 knowns before 0.30.0 Path Traversal via Import NamePriority MEDIUM 45
Timeline
- 2026-10-02 Threatist record created from CVE-2026-86538
- 2026-10-03 Alias added: GHSA-g3m9-72x4-rrgv
References
More knowns-dev vulnerabilities
- TI-2026-60300 knowns through 0.33.0 Authorization Bypass via project.set Bootstrap Exemption CVSS 4.0HIGH 8.7
- TI-2026-60298 knowns through 0.33.0 Path Traversal via Template Engine CVSS 4.0HIGH 8.6
- TI-2026-59217 knowns before 0.30.0 Arbitrary Code Execution via LSP Binary CVSS 4.0HIGH 8.5
- TI-2026-60301 knowns through 0.33.0 Arbitrary Directory Enumeration via workspace browse endpoint CVSS 4.0MEDIUM 6.9
- TI-2026-60299 knowns through 0.33.0 Path Traversal via code.find MCP tool CVSS 4.0HIGH 7.1
- TI-2026-60283 knowns before 0.31.0 External Control of Agent Working Directory via x-opencode-directory Header CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-86538 · CVE Program
- CVE-2026-86538 · NVD
- FIRST EPSS
- GHSA-g3m9-72x4-rrgv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences