EUVD-2026-74952
GHSA-h5q7-w9w4-9hcf
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/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
Network-accessible unauthenticated default API; confidentiality limited to .md reads; integrity high for arbitrary .md writes; availability low for file deletion.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
knowns (npm package) versions <= 0.29.1 contain a path traversal vulnerability in the Document API. The HTTP handler in internal/server/routes/docs.go normalizes the user-supplied document path with cleanDocPath(), which strips leading/trailing slashes and the .md suffix but does not neutralize ../ traversal sequences, and internal/storage/doc_store.go then builds the target path with filepath.Join(ds.docsDir(), filepath.FromSlash(doc.Path)+".md") without verifying that the resolved path remains inside the documents directory. In the default deployment, where the Management API is unauthenticated and bound to all interfaces, a remote unauthenticated attacker can supply a traversal payload (for example {"path": "../../../../tmp/knowns_pwn_marker"} to POST /api/docs, or an encoded path to GET /api/docs/...) to read, create, overwrite, or delete arbitrary files with a .md extension anywhere on the host filesystem and to create arbitrary directories via os.MkdirAll. This can expose sensitive data stored in other projects' documentation, corrupt or destroy files, and provide an arbitrary-write primitive that may be chained toward code execution. The issue is fixed in version 0.30.0.
Articles & Coverage 1
AnalysisAI
Path traversal in the knowns npm documentation tool (versions ≤ 0.29.1) enables remote unauthenticated attackers to read, create, overwrite, or delete arbitrary files with a .md extension anywhere on the host filesystem, and to create arbitrary directories via os.MkdirAll. The Document API's sanitization function cleanDocPath() strips slashes and .md suffixes but leaves ../ sequences intact, allowing filepath.Join() to resolve paths outside the intended documents directory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Default deployment of knowns where the Management API is unauthenticated and bound to all network interfaces (0.0.0.0) - this is explicitly described as the default configuration. … 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/VC:L/VI:H/VA:L) scoring 8.8 accurately reflects the threat model for default deployments: the Management API is unauthenticated and listens on all interfaces, making the flaw trivially exploitable from any network-reachable host. … 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 knowns to version 0.30.0, which patches the path traversal by properly neutralizing ../ sequences in cleanDocPath() before filepath.Join() resolves the final path. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running the knowns npm documentation tool and determine which are running version 0.29.1 or earlier. …
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Same weakness CWE-22 – Path Traversal
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External POC / Exploit Code
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