GHSA-w47m-jpv2-qfw5: Duplicate Advisory Knowns Sandbox Escape: Unauthenticated Header Vulnerability

CRITICAL
Share
CVSS 9.8
CWE-73
Published
Advisory Summary

GHSA-w47m-jpv2-qfw5 is a CRITICAL (CVSS 9.8) knowns sandbox escape: unauthenticated header vulnerability (CWE-73: External Control of File Name or Path) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves knowns sandbox escape: unauthenticated header injection grants ai agent unrestricted access to host filesystem. Remediation is available in the latest vendor maintenance releases.

GHSA-w47m-jpv2-qfw5 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-w47m-jpv2-qfw5
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-73: External Control of File Name or Path
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-w47m-jpv2-qfw5

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

knowns fixed: Latest secure release 
npm install knowns@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls knowns

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-w47m-jpv2-qfw5, inspect your project dependencies using npm:

npm ls knowns

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls knowns command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-73: External Control of File Name or Path, where the product allows user input to control or influence paths or file names that are used in filesystem operations. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-9h2q-r9fh-f98w. This link is maintained to preserve external references. ### Original Description knowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.

GHSA-w47m-jpv2-qfw5 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
knowns
npm/knowns
npm

References

GitHub Advisory / Wiki ADVISORY
https://github.com/knowns-dev/knowns/security/advisories/GHSA-9h2q-r9fh-f98w
NVD — GHSA-w47m-jpv2-qfw5 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88899
Security Fix Commit FIX COMMIT
https://github.com/knowns-dev/knowns/commit/37db0561b37b48b8bd035a417d7f1da6258ae657
Duplicate Advisory Source Repository REPOSITORY
https://github.com/knowns-dev/knowns/blob/v0.30.0/internal/server/server.go#L1283-L1296
Duplicate Advisory Release RELEASE
https://github.com/knowns-dev/knowns/releases/tag/v0.31.0
www.vulncheck.com/advisories/knowns-b... WEB
https://www.vulncheck.com/advisories/knowns-before-0.31.0-external-control-of-agent-working-directory-via-x-opencode-directory-header

Frequently Asked Questions

What is GHSA-w47m-jpv2-qfw5?
GHSA-w47m-jpv2-qfw5 is a security vulnerability in Duplicate Advisory involving Knowns Sandbox Escape: Unauthenticated Header Injection Grants AI Agent Unrestricted Access to Host Filesystem under CWE-73: External Control of File Name or Path.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: knowns.
What version fixes GHSA-w47m-jpv2-qfw5?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is knowns affected?
Yes, knowns is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-w47m-jpv2-qfw5?
GHSA-w47m-jpv2-qfw5 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-w47m-jpv2-qfw5?
GHSA-w47m-jpv2-qfw5 is classified under CWE-73: External Control of File Name or Path (The product allows user input to control or influence paths or file names that are used in filesystem operations.).
How can I check npm dependencies for GHSA-w47m-jpv2-qfw5?
Run the dependency tree command: 'npm ls knowns'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w47m-jpv2-qfw5",
  "modified" : "2026-09-25T17:11:36Z",
  "published" : "2026-09-10T18:31:45Z",
  "withdrawn" : "2026-09-25T17:11:36Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Knowns Sandbox Escape: Unauthenticated Header Injection Grants AI Agent Unrestricted Access to Host Filesystem",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-9h2q-r9fh-f98w. This link is maintained to preserve external references.\n\n### Original Description\nknowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "knowns"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 0.31.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/knowns-dev/knowns/security/advisories/GHSA-9h2q-r9fh-f98w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-88899"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knowns-dev/knowns/commit/37db0561b37b48b8bd035a417d7f1da6258ae657"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knowns-dev/knowns/blob/v0.30.0/internal/server/server.go#L1283-L1296"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knowns-dev/knowns/releases/tag/v0.31.0"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/knowns-before-0.31.0-external-control-of-agent-working-directory-via-x-opencode-directory-header"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-73" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-25T17:11:36Z",
    "nvd_published_at" : "2026-09-10T16:18:12Z"
  }
}