CVE-2026-22178: Openclaw Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-c6hr-w26q-c636
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CWE-1333
Published
Advisory Summary

CVE-2026-22178 is a MODERATE denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Openclaw libraries in the npm ecosystem. The issue involves openclaw has redos and regex injection via unescaped feishu mention metadata in regexp construction. Remediation is available by upgrading affected packages to version 2026.2.19.

CVE-2026-22178 at a Glance

CVE Identifier CVE-2026-22178
GHSA Identifier GHSA-c6hr-w26q-c636
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Openclaw
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-22178

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-2026-22178, 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-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. 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 `extensions/feishu/src/bot.ts` constructed `new RegExp()` directly from Feishu mention metadata (`mention.name`, `mention.key`) in `stripBotMention()` without escaping regex metacharacters. ## Affected Packages / Versions - Package: npm `openclaw` - Affected versions: `<= 2026.2.17` - First affected release: `2026.2.6` - Patched version: `2026.2.19` ## Impact - ReDoS: crafted nested-quantifier patterns in mention metadata can trigger catastrophic backtracking and block message processing. - Regex injection: metacharacters in mention metadata can remove unintended message content before it is sent to the model. ## Fix Commit(s) - `7e67ab75cc2f0e93569d12fecd1411c2961fcc8c` - `74268489137510b6f6349919d1e197b17290d92c` Thanks @allsmog for reporting.

CVE-2026-22178 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-c6hr-w26q-c636
NVD — CVE-2026-22178 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22178
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/74268489137510b6f6349919d1e197b17290d92c
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/7e67ab75cc2f0e93569d12fecd1411c2961fcc8c
Openclaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-redos-and-regex-injection-via-unescaped-feishu-mention-metadata

Frequently Asked Questions

What is CVE-2026-22178?
CVE-2026-22178 is a security vulnerability in Openclaw involving OpenClaw has ReDoS and regex injection via unescaped Feishu mention metadata in RegExp construction under CWE-1333: Inefficient Regular Expression Complexity.
Which Openclaw versions are affected?
Affected versions include releases prior to 2026.2.19 across affected packages: openclaw.
What version fixes CVE-2026-22178?
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-2026-22178?
CVE-2026-22178 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check npm dependencies for CVE-2026-22178?
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-c6hr-w26q-c636",
  "modified" : "2026-03-19T18:33:51Z",
  "published" : "2026-03-02T22:17:30Z",
  "aliases" : [ "CVE-2026-22178" ],
  "summary" : "OpenClaw has ReDoS and regex injection via unescaped Feishu mention metadata in RegExp construction",
  "details" : "## Summary\n\n`extensions/feishu/src/bot.ts` constructed `new RegExp()` directly from Feishu mention metadata (`mention.name`, `mention.key`) in `stripBotMention()` without escaping regex metacharacters.\n\n## Affected Packages / Versions\n\n- Package: npm `openclaw`\n- Affected versions: `<= 2026.2.17`\n- First affected release: `2026.2.6`\n- Patched version: `2026.2.19`\n\n## Impact\n\n- ReDoS: crafted nested-quantifier patterns in mention metadata can trigger catastrophic backtracking and block message processing.\n- Regex injection: metacharacters in mention metadata can remove unintended message content before it is sent to the model.\n\n## Fix Commit(s)\n\n- `7e67ab75cc2f0e93569d12fecd1411c2961fcc8c`\n- `74268489137510b6f6349919d1e197b17290d92c`\n\nThanks @allsmog 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:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.19"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-c6hr-w26q-c636"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-22178"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/74268489137510b6f6349919d1e197b17290d92c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/7e67ab75cc2f0e93569d12fecd1411c2961fcc8c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-redos-and-regex-injection-via-unescaped-feishu-mention-metadata"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-02T22:17:30Z",
    "nvd_published_at" : "2026-03-18T02:16:22Z"
  }
}