Skip to main content

knowns EUVDEUVD-2026-72560

| CVE-2026-86542 HIGH
Path Traversal (CWE-22)
2026-09-07 VulnCheck GHSA-8mhw-737q-f96r
8.8
CVSS 4.0 · Vendor: VulnCheck
Share

Severity by source

Vendor (VulnCheck) PRIMARY
8.8 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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
vuln.today AI
9.1 CRITICAL

Unauthenticated network path traversal enabling arbitrary server-writable file overwrites; no confidentiality impact, but high integrity and availability impact from unrestricted write primitive.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
POC Analysis Generated
Sep 08, 2026 - 11:24 vuln.today
Source Code Evidence Fetched
Sep 07, 2026 - 23:36 vuln.today
Analysis Generated
Sep 07, 2026 - 23:36 vuln.today
CVE Published
Sep 07, 2026 - 23:03 cve.org
HIGH 8.8

DescriptionCVE.org

knowns before 0.30.0 fails to validate import names in the import routes, allowing unauthenticated attackers to write files outside the imports directory. Attackers can supply traversal sequences in the name parameter to escape the imports directory and overwrite arbitrary files writable by the server process.

AnalysisAI

Path traversal in knowns before v0.30.0 permits unauthenticated remote attackers to write files outside the designated imports directory by embedding directory traversal sequences in the import name parameter of the import routes API. Any file writable by the server process can be overwritten, making this a potential remote code execution primitive if configuration files, scripts, or other executable content reside within the process's write reach. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation No special conditions are required beyond network access to the knowns server's import routes endpoint - the CVSS vector is AV:N/AC:L/PR:N/UI:N, meaning this is unauthenticated remote exploitation against any reachable knowns instance running a version before 0.30.0. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) assigns the highest possible accessibility - fully unauthenticated, network-reachable, no complexity or special conditions - which aligns with the description of an unvalidated HTTP parameter. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to knowns v0.30.0 or later, which incorporates the patch from commit d3989829fb5095666d23d005b2f78a082832a396 and resolves the import-name validation gap. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all systems running knowns prior to v0.30.0 and assess their network exposure to ensure internet-facing instances are prioritized. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Knowns

View all
CVE-2026-86543 CRITICAL
9.3 Sep 07

Missing authentication in Knowns (knowns-dev/knowns) before 0.30.0 exposes the management API on all network interfaces

CVE-2026-88899 CRITICAL
9.3 Sep 10

External control of a filesystem path in Knowns (knowns-dev/knowns) before 0.31.0 lets remote attackers escape the proje

CVE-2026-86775 HIGH
8.8 Sep 09

Path traversal in the knowns npm documentation tool (versions ≤ 0.29.1) enables remote unauthenticated attackers to read

CVE-2026-86439 HIGH
8.7 Sep 07

Path traversal in knowns (a Go-based MCP-integrated knowledge management server) before version 0.30.0 allows authentica

CVE-2026-86538 HIGH
8.7 Sep 07

Path traversal in the knowns template-preview API (versions before 0.30.0) allows unauthenticated remote attackers to re

CVE-2026-88939 HIGH
8.7 Sep 10

Privilege escalation in knowns through 0.33.0 permits authenticated read-only agent sessions to bypass authorization con

CVE-2026-88937 HIGH
8.6 Sep 10

Path traversal in the knowns code generation template engine (versions through 0.33.0) allows unauthenticated remote att

CVE-2026-86540 HIGH
8.5 Sep 07

Arbitrary binary execution in knowns before 0.30.0 is triggered when a developer opens a repository containing a crafted

CVE-2026-86541 HIGH
7.2 Sep 07

Path traversal in the knowns MCP server's handleCodeReplace() function allows unauthenticated network attackers to overw

CVE-2026-86544 HIGH
7.2 Sep 07

Authorization bypass in knowns before v0.30.0 allows low-privileged users holding read-restricted sessions to escalate p

CVE-2026-88938 HIGH
7.1 Sep 10

Path traversal in knowns through version 0.33.0 allows authenticated AI agent sessions to read arbitrary files anywhere

CVE-2026-86539 MEDIUM
6.9 Sep 07

Server-side request forgery in Knowns ≤0.33.0 enables unauthenticated remote attackers to make the server issue outbound

Share

EUVD-2026-72560 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy