Vulnerability-Lookup

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"
}

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

CWE

CWE-408 - Incorrect Behavior Order: Early Amplification

Assigner

VulnCheck

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
OpenClaw	OpenClaw	Affected: 0 , < 2026.3.31 (semver) Unaffected: 2026.3.31 (semver)

Date Public

2026-03-31 00:00

Credits

AntAISecurityLab

Show details on NVD website

JSON

To clipboard

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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.

Action not permitted

GHSA-P464-M8X6-VHV8

Summary

Current Maintainer Triage

Affected Packages / Versions

Fix Commit(s)

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

Tags

Sightings

Nomenclature