CVE-2026-41403: OpenClaw Diffs Viewer Misclassifies Proxied Remote Vulnerability

MODERATE
Advisory Identifier: GHSA-3xv9-89fm-7h4r
Share
CVSS 4.0
CWE-807 CWE-348
Published
Advisory Summary

CVE-2026-41403 is a MODERATE (CVSS 4.0) diffs viewer misclassifies proxied remote vulnerability (CWE-807: Reliance on Untrusted Inputs in a Security Decision) affecting OpenClaw libraries in the npm ecosystem. The issue involves diffs viewer misclassifies proxied remote requests as loopback when `allowremoteviewer` is disabled. Remediation is available by upgrading affected packages to version 2026.3.31.

CVE-2026-41403 at a Glance

CVE Identifier CVE-2026-41403
GHSA Identifier GHSA-3xv9-89fm-7h4r
Severity MODERATE
CVSS v3.1 Base Score 4.0
CWE Classification CWE-807: Reliance on Untrusted Inputs in a Security Decision
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.0

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

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

How to Fix CVE-2026-41403

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-2026-41403, 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-807: Reliance on Untrusted Inputs in a Security Decision, where the product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism. 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 diffs viewer misclassifies proxied remote requests as loopback when `allowRemoteViewer` is disabled ## Current Maintainer Triage - Status: open - Normalized severity: low - Assessment: Shipped v2026.3.28 misclassified proxied diff-viewer requests as local loopback in some cases, a real but low-severity access-control flaw. ## 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) - `30a1690323088fd291abd11643a264a6828a002c` — 2026-03-30T14:17:27-06:00 ## 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 @smaeljaish771 for reporting.

CVE-2026-41403 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-3xv9-89fm-7h4r
NVD — CVE-2026-41403 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41403
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/30a1690323088fd291abd11643a264a6828a002c
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
OpenClaw Release RELEASE
https://github.com/openclaw/openclaw/releases/tag/v2026.3.31
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-access-control-bypass-via-proxied-remote-request-misclassification

Frequently Asked Questions

What is CVE-2026-41403?
CVE-2026-41403 is a security vulnerability in OpenClaw involving diffs viewer misclassifies proxied remote requests as loopback when `allowRemoteViewer` is disabled under CWE-807: Reliance on Untrusted Inputs in a Security Decision.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.3.31 across affected packages: openclaw.
What version fixes CVE-2026-41403?
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-2026-41403?
CVE-2026-41403 has a CVSS v3.1 base score of 4.0 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-41403?
CVE-2026-41403 is classified under CWE-807: Reliance on Untrusted Inputs in a Security Decision (The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.).
How can I check npm dependencies for CVE-2026-41403?
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-3xv9-89fm-7h4r",
  "modified" : "2026-05-06T20:32:43Z",
  "published" : "2026-04-03T03:24:25Z",
  "aliases" : [ "CVE-2026-41403" ],
  "summary" : "OpenClaw: diffs viewer misclassifies proxied remote requests as loopback when `allowRemoteViewer` is disabled",
  "details" : "## Summary\ndiffs viewer misclassifies proxied remote requests as loopback when `allowRemoteViewer` is disabled\n\n## Current Maintainer Triage\n- Status: open\n- Normalized severity: low\n- Assessment: Shipped v2026.3.28 misclassified proxied diff-viewer requests as local loopback in some cases, a real but low-severity access-control flaw.\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- `30a1690323088fd291abd11643a264a6828a002c` — 2026-03-30T14:17:27-06:00\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 @smaeljaish771 for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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-3xv9-89fm-7h4r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41403"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/30a1690323088fd291abd11643a264a6828a002c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.3.31"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-access-control-bypass-via-proxied-remote-request-misclassification"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-348", "CWE-807" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-03T03:24:25Z",
    "nvd_published_at" : "2026-04-28T19:37:43Z"
  }
}