CVE-2026-27488: Openclaw OpenClaw Hardened Cron Webhook Delivery Vulnerability

MODERATE
Advisory Identifier: GHSA-w45g-5746-x9fp
Share
CWE-918
Published
Advisory Summary

CVE-2026-27488 is a MODERATE openclaw hardened cron webhook delivery vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Openclaw libraries in the npm ecosystem. The issue involves openclaw hardened cron webhook delivery against ssrf. Remediation is available by upgrading affected packages to version 2026.2.19.

CVE-2026-27488 at a Glance

CVE Identifier CVE-2026-27488
GHSA Identifier GHSA-w45g-5746-x9fp
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Openclaw
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-27488

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: 2026.2.19 
npm install openclaw@2026.2.19
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-2026-27488, 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 2026.2.19), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. 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

## Affected Packages / Versions - `openclaw` npm package versions `<= 2026.2.17`. ## Vulnerability Cron webhook delivery in `src/gateway/server-cron.ts` used `fetch()` directly, so webhook targets could reach private/metadata/internal endpoints without SSRF policy checks. ## Fix Commit(s) - `99db4d13e` - `35851cdaf` Thanks @Adam55A-code for reporting.

CVE-2026-27488 Affected Openclaw Versions

1 component(s)
Fixed Versions:
2026.2.19
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.2.19
2026.2.19

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-w45g-5746-x9fp
NVD — CVE-2026-27488 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27488
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/99db4d13e5c139883ef0def9ff963e9273179655
Openclaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
Openclaw Release RELEASE
https://github.com/openclaw/openclaw/releases/tag/v2026.2.19

Frequently Asked Questions

What is CVE-2026-27488?
CVE-2026-27488 is a security vulnerability in Openclaw involving OpenClaw hardened cron webhook delivery against SSRF under CWE-918: Server-Side Request Forgery (SSRF).
Which Openclaw versions are affected?
Affected versions include releases prior to 2026.2.19 across affected packages: openclaw.
What version fixes CVE-2026-27488?
Upgrading to 2026.2.19 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.2.19. Upgrade your dependency to 2026.2.19 or later.
What CWE is associated with CVE-2026-27488?
CVE-2026-27488 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check npm dependencies for CVE-2026-27488?
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-w45g-5746-x9fp",
  "modified" : "2026-02-23T22:29:47Z",
  "published" : "2026-02-20T21:13:03Z",
  "aliases" : [ "CVE-2026-27488" ],
  "summary" : "OpenClaw hardened cron webhook delivery against SSRF",
  "details" : "## Affected Packages / Versions\n\n- `openclaw` npm package versions `<= 2026.2.17`.\n\n## Vulnerability\nCron webhook delivery in `src/gateway/server-cron.ts` used `fetch()` directly, so webhook targets could reach private/metadata/internal endpoints without SSRF policy checks.\n\n## Fix Commit(s)\n- `99db4d13e`\n- `35851cdaf`\n\nThanks @Adam55A-code for reporting.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.19"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.2.17"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-w45g-5746-x9fp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27488"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/99db4d13e5c139883ef0def9ff963e9273179655"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.2.19"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-20T21:13:03Z",
    "nvd_published_at" : "2026-02-21T10:16:13Z"
  }
}