Vulnerability-Lookup

CVE-2026-41405 (GCVE-0-2026-41405)

Vulnerability from cvelistv5 – Published: 2026-04-28 18:10 – Updated: 2026-04-29 12:16 X_Open Source

Title

OpenClaw < 2026.3.31 - Resource Exhaustion via Unauthenticated MS Teams Webhook Body Parsing

Summary

OpenClaw before 2026.3.31 parses MS Teams webhook request bodies before performing JWT validation, allowing unauthenticated attackers to trigger resource exhaustion. Remote attackers can send malicious Teams webhook payloads to exhaust server resources by bypassing authentication checks.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-29 12:16 UTC

CWE

CWE-408 - Incorrect Behavior Order: Early Amplification

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
https://github.com/openclaw/openclaw/commit/3834d…	patch
https://www.vulncheck.com/advisories/openclaw-res…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
OpenClaw	OpenClaw	Affected: 0 , < 2026.3.31 (semver) Unaffected: 2026.3.31 (semver) cpe:2.3:a:openclaw:openclaw::::::node.js::*

Date Public

2026-03-31 00:00

Credits

AntAISecurityLab

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-41405

Vulnerability from fkie_nvd - Published: 2026-04-28 19:37 - Updated: 2026-06-17 10:46

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
disclosure@vulncheck.com	https://github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623	Patch
disclosure@vulncheck.com	https://github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8	Vendor Advisory
disclosure@vulncheck.com	https://www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-ms-teams-webhook-body-parsing	Third Party Advisory

Impacted products

	Vendor	Product	Version
	openclaw	openclaw	*

JSON

To clipboard

{
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GHSA-P464-M8X6-VHV8

Vulnerability from github – Published: 2026-04-03 02:54 – Updated: 2026-05-06 02:40

Summary

OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion

Details

Summary

MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion

Current Maintainer Triage

Status: open
Normalized severity: medium
Assessment: v2026.3.28 still parses Teams JSON after only a Bearer-prefix gate and before real JWT validation, and the auth-before-parse fix is not yet shipped.

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)

3834d47099dd13c8244ed6de8b9ea9855c553623 — 2026-03-30T13:46:40+01:00

OpenClaw thanks @AntAISecurityLab for reporting.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.3.28"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.3.31"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41405"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-408"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-03T02:54:38Z",
    "nvd_published_at": "2026-04-28T19:37:44Z",
    "severity": "HIGH"
  },
  "details": "## Summary\nMS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion\n\n## Current Maintainer Triage\n- Status: open\n- Normalized severity: medium\n- Assessment: v2026.3.28 still parses Teams JSON after only a Bearer-prefix gate and before real JWT validation, and the auth-before-parse fix is not yet shipped.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published npm version: `2026.3.31`\n- Vulnerable version range: `\u003c=2026.3.28`\n- Patched versions: `\u003e= 2026.3.31`\n- First stable tag containing the fix: `v2026.3.31`\n\n## Fix Commit(s)\n- `3834d47099dd13c8244ed6de8b9ea9855c553623` \u2014 2026-03-30T13:46:40+01:00\n\nOpenClaw thanks @AntAISecurityLab for reporting.",
  "id": "GHSA-p464-m8x6-vhv8",
  "modified": "2026-05-06T02:40:42Z",
  "published": "2026-04-03T02:54:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41405"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623"
    },
    {
      "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-resource-exhaustion-via-unauthenticated-ms-teams-webhook-body-parsing"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion"
}

WID-SEC-W-2026-0948

Vulnerability from csaf_certbund - Published: 2026-03-31 22:00 - Updated: 2026-04-28 22:00

Summary

OpenClaw: Mehrere Schwachstellen

Severity

Hoch

Scope

52 vulnerabilities in this advisory, including CVE-2026-41405.

CVE-2026-41405

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-41405 (GCVE-0-2026-41405)

FKIE_CVE-2026-41405

GHSA-P464-M8X6-VHV8

Summary

Current Maintainer Triage

Affected Packages / Versions

Fix Commit(s)

WID-SEC-W-2026-0948

Tags

Sightings

Nomenclature