CVE-2026-41408: OpenClaw Tlon Media Downloads Can Bypass Vulnerability

MODERATE
Advisory Identifier: GHSA-4g5x-2jfc-xm98
Share
CVSS 6.5
CWE-434 CWE-770
Published
Advisory Summary

CVE-2026-41408 is a MODERATE (CVSS 6.5) tlon media downloads can bypass vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting OpenClaw libraries in the npm ecosystem. The issue involves tlon media downloads can bypass core safety limits and exhaust disk. Remediation is available by upgrading affected packages to version 2026.3.31.

CVE-2026-41408 at a Glance

CVE Identifier CVE-2026-41408
GHSA Identifier GHSA-4g5x-2jfc-xm98
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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

How to Fix CVE-2026-41408

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

openclaw fixed: 2026.3.31 
npm install openclaw@2026.3.31
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 openclaw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-41408, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of OpenClaw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.3.31), your application is affected.

Note: The npm ls openclaw 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In OpenClaw, 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

## Summary Tlon media downloads can bypass core safety limits and exhaust disk ## Current Maintainer Triage - Status: narrow - Normalized severity: low - Assessment: Shipped v2026.3.28 Tlon media downloads bypassed core size/count/cleanup limits, but this is availability-only resource exhaustion in a bundled plugin path, so low. ## Affected Packages / Versions - Package: `openclaw` (npm) - Latest published npm version: `2026.3.31` - Vulnerable version range: `<=2026.3.28` - Patched versions: `>= 2026.3.31` - First stable tag containing the fix: `v2026.3.31` ## Fix Commit(s) - `2194587d70d2aef863508b945319c5a7c88b12ce` — 2026-03-31T19:40:15+09:00 ## Release Process Note - The fix is already present in released version `2026.3.31`. - This draft looks ready for final maintainer disposition or publication, not additional code-fix work. Thanks @AntAISecurityLab for reporting.

CVE-2026-41408 Affected OpenClaw Versions

1 component(s)
Fixed Versions:
2026.3.31
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.3.31
2026.3.31

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-4g5x-2jfc-xm98
NVD — CVE-2026-41408 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41408
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/2194587d70d2aef863508b945319c5a7c88b12ce
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-disk-exhaustion-via-media-download-bypass

Frequently Asked Questions

What is CVE-2026-41408?
CVE-2026-41408 is a security vulnerability in OpenClaw involving Tlon media downloads can bypass core safety limits and exhaust disk under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.3.31 across affected packages: openclaw.
What version fixes CVE-2026-41408?
Upgrading to 2026.3.31 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.3.31. Upgrade your dependency to 2026.3.31 or later.
What is the CVSS score of CVE-2026-41408?
CVE-2026-41408 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-41408?
CVE-2026-41408 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check npm dependencies for CVE-2026-41408?
Run the dependency tree command: 'npm ls openclaw'. 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-4g5x-2jfc-xm98",
  "modified" : "2026-05-06T21:23:08Z",
  "published" : "2026-04-07T18:10:41Z",
  "aliases" : [ "CVE-2026-41408" ],
  "summary" : "OpenClaw: Tlon media downloads can bypass core safety limits and exhaust disk",
  "details" : "## Summary\nTlon media downloads can bypass core safety limits and exhaust disk\n\n## Current Maintainer Triage\n- Status: narrow\n- Normalized severity: low\n- Assessment: Shipped v2026.3.28 Tlon media downloads bypassed core size/count/cleanup limits, but this is availability-only resource exhaustion in a bundled plugin path, so low.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published npm version: `2026.3.31`\n- Vulnerable version range: `<=2026.3.28`\n- Patched versions: `>= 2026.3.31`\n- First stable tag containing the fix: `v2026.3.31`\n\n## Fix Commit(s)\n- `2194587d70d2aef863508b945319c5a7c88b12ce` — 2026-03-31T19:40:15+09:00\n\n## Release Process Note\n- The fix is already present in released version `2026.3.31`.\n- This draft looks ready for final maintainer disposition or publication, not additional code-fix work.\n\nThanks @AntAISecurityLab for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.3.31"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.3.28"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-4g5x-2jfc-xm98"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41408"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/2194587d70d2aef863508b945319c5a7c88b12ce"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-disk-exhaustion-via-media-download-bypass"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-07T18:10:41Z",
    "nvd_published_at" : "2026-04-28T19:37:44Z"
  }
}