Vulnerability-Lookup

GHSA-Q447-RJ3R-2CGH

Vulnerability from github – Published: 2026-02-18 00:53 – Updated: 2026-03-05 21:53

Summary

OpenClaw affected by denial of service via unbounded webhook request body buffering

Details

Summary

Multiple webhook handlers accepted and buffered request bodies without a strict unified byte/time limit. A remote unauthenticated attacker could send oversized payloads and cause memory pressure, degrading availability.

Details

Affected packages: - openclaw (npm): <2026.2.12 - clawdbot (npm): <=2026.1.24-3

Root cause: - Webhook code paths buffered request payloads without consistent maxBytes + timeoutMs enforcement. - Some SDK-backed handlers parse request bodies internally and needed stream-level guards.

Attack shape: - Send very large JSON payloads or slow/incomplete uploads to webhook endpoints. - Observe elevated memory usage and request handler pressure.

Impact

Remote unauthenticated availability impact (DoS) via request body amplification/memory pressure.

Patch details (implemented)

Added shared bounded request-body helper in src/infra/http-body.ts.
Exported helper in src/plugin-sdk/index.ts for extension reuse.
Migrated webhook body readers to shared helper for:
LINE
Nextcloud Talk
Google Chat
Zalo
BlueBubbles
Nostr profile HTTP
Voice-call
Gateway hooks
Added stream guards for SDK handlers that parse request bodies internally:
Slack
Telegram
Feishu
Added explicit Express JSON body limit handling for MS Teams webhook path.
Standardized failure responses:
413 Payload Too Large
408 Request Timeout

Tests

Added regression tests:
src/infra/http-body.test.ts
src/line/monitor.read-body.test.ts
extensions/nextcloud-talk/src/monitor.read-body.test.ts
Focused webhook/security test suite passes for patched paths.

Remediation

Upgrade to the first release containing this patch.

Credits

Thanks @vincentkoc 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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.2.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "clawdbot"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2026.1.24-3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-28478"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-18T00:53:07Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nMultiple webhook handlers accepted and buffered request bodies without a strict unified byte/time limit. A remote unauthenticated attacker could send oversized payloads and cause memory pressure, degrading availability.\n\n### Details\nAffected packages:\n- `openclaw` (npm): `\u003c2026.2.12`\n- `clawdbot` (npm): `\u003c=2026.1.24-3`\n\nRoot cause:\n- Webhook code paths buffered request payloads without consistent `maxBytes` + `timeoutMs` enforcement.\n- Some SDK-backed handlers parse request bodies internally and needed stream-level guards.\n\nAttack shape:\n- Send very large JSON payloads or slow/incomplete uploads to webhook endpoints.\n- Observe elevated memory usage and request handler pressure.\n\n### Impact\nRemote unauthenticated availability impact (DoS) via request body amplification/memory pressure.\n\n### Patch details (implemented)\n- Added shared bounded request-body helper in `src/infra/http-body.ts`.\n- Exported helper in `src/plugin-sdk/index.ts` for extension reuse.\n- Migrated webhook body readers to shared helper for:\n  - LINE\n  - Nextcloud Talk\n  - Google Chat\n  - Zalo\n  - BlueBubbles\n  - Nostr profile HTTP\n  - Voice-call\n  - Gateway hooks\n- Added stream guards for SDK handlers that parse request bodies internally:\n  - Slack\n  - Telegram\n  - Feishu\n- Added explicit Express JSON body limit handling for MS Teams webhook path.\n- Standardized failure responses:\n  - `413 Payload Too Large`\n  - `408 Request Timeout`\n\n### Tests\n- Added regression tests:\n  - `src/infra/http-body.test.ts`\n  - `src/line/monitor.read-body.test.ts`\n  - `extensions/nextcloud-talk/src/monitor.read-body.test.ts`\n- Focused webhook/security test suite passes for patched paths.\n\n### Remediation\nUpgrade to the first release containing this patch.\n\n## Credits\nThanks @vincentkoc for reporting.",
  "id": "GHSA-q447-rj3r-2cgh",
  "modified": "2026-03-05T21:53:39Z",
  "published": "2026-02-18T00:53:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    }
  ],
  "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"
    }
  ],
  "summary": "OpenClaw affected by denial of service via unbounded webhook request body buffering"
}

brew-openclaw-cli-cve-2026-28478

Vulnerability from osv_homebrew

Published

2026-08-13 17:21

Modified

2026-09-12 09:47

Summary

OpenClaw affected by denial of service via unbounded webhook request body buffering

Details

Summary

Details

Affected packages: - openclaw (npm): <2026.2.12 - clawdbot (npm): <=2026.1.24-3

Attack shape: - Send very large JSON payloads or slow/incomplete uploads to webhook endpoints. - Observe elevated memory usage and request handler pressure.

Impact

Remote unauthenticated availability impact (DoS) via request body amplification/memory pressure.

Patch details (implemented)

Added shared bounded request-body helper in src/infra/http-body.ts.
Exported helper in src/plugin-sdk/index.ts for extension reuse.
Migrated webhook body readers to shared helper for:
LINE
Nextcloud Talk
Google Chat
Zalo
BlueBubbles
Nostr profile HTTP
Voice-call
Gateway hooks
Added stream guards for SDK handlers that parse request bodies internally:
Slack
Telegram
Feishu
Added explicit Express JSON body limit handling for MS Teams webhook path.
Standardized failure responses:
413 Payload Too Large
408 Request Timeout

Tests

Added regression tests:
src/infra/http-body.test.ts
src/line/monitor.read-body.test.ts
extensions/nextcloud-talk/src/monitor.read-body.test.ts
Focused webhook/security test suite passes for patched paths.

Remediation

Upgrade to the first release containing this patch.

Credits

Thanks @vincentkoc 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

References

URL

Type

	https://github.com/openclaw/openclaw/security/adv…	WEB
	https://github.com/openclaw/openclaw	PACKAGE

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "2026.2.13"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "openclaw-cli",
        "purl": "pkg:brew/openclaw-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "npm",
        "key": "pkg:npm/openclaw@2026.9.4",
        "name": "openclaw",
        "strategy": "registry",
        "subject_version": "2026.9.4"
      }
    ]
  },
  "details": "### Summary\nMultiple webhook handlers accepted and buffered request bodies without a strict unified byte/time limit. A remote unauthenticated attacker could send oversized payloads and cause memory pressure, degrading availability.\n\n### Details\nAffected packages:\n- `openclaw` (npm): `\u003c2026.2.12`\n- `clawdbot` (npm): `\u003c=2026.1.24-3`\n\nRoot cause:\n- Webhook code paths buffered request payloads without consistent `maxBytes` + `timeoutMs` enforcement.\n- Some SDK-backed handlers parse request bodies internally and needed stream-level guards.\n\nAttack shape:\n- Send very large JSON payloads or slow/incomplete uploads to webhook endpoints.\n- Observe elevated memory usage and request handler pressure.\n\n### Impact\nRemote unauthenticated availability impact (DoS) via request body amplification/memory pressure.\n\n### Patch details (implemented)\n- Added shared bounded request-body helper in `src/infra/http-body.ts`.\n- Exported helper in `src/plugin-sdk/index.ts` for extension reuse.\n- Migrated webhook body readers to shared helper for:\n  - LINE\n  - Nextcloud Talk\n  - Google Chat\n  - Zalo\n  - BlueBubbles\n  - Nostr profile HTTP\n  - Voice-call\n  - Gateway hooks\n- Added stream guards for SDK handlers that parse request bodies internally:\n  - Slack\n  - Telegram\n  - Feishu\n- Added explicit Express JSON body limit handling for MS Teams webhook path.\n- Standardized failure responses:\n  - `413 Payload Too Large`\n  - `408 Request Timeout`\n\n### Tests\n- Added regression tests:\n  - `src/infra/http-body.test.ts`\n  - `src/line/monitor.read-body.test.ts`\n  - `extensions/nextcloud-talk/src/monitor.read-body.test.ts`\n- Focused webhook/security test suite passes for patched paths.\n\n### Remediation\nUpgrade to the first release containing this patch.\n\n## Credits\nThanks @vincentkoc for reporting.",
  "id": "BREW-openclaw-cli-CVE-2026-28478",
  "modified": "2026-09-12T09:47:35Z",
  "published": "2026-08-13T17:21:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenClaw affected by denial of service via unbounded webhook request body buffering",
  "upstream": [
    "GHSA-q447-rj3r-2cgh",
    "CVE-2026-28478"
  ]
}

CVE-2026-28478 (GCVE-0-2026-28478)

Vulnerability from cvelistv5 – Published: 2026-03-05 21:59 – Updated: 2026-03-09 18:12

Title

OpenClaw < 2026.2.13 - Denial of Service via Unbounded Webhook Request Body Buffering

Summary

OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.

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 2026-03-09 18:11 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
https://github.com/openclaw/openclaw/commit/3cbcb…	patch
https://www.vulncheck.com/advisories/openclaw-den…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
OpenClaw	OpenClaw	Affected: 0 , < 2026.2.13 (custom) cpe:2.3:a:openclaw:openclaw::::::node.js::*

Date Public

2026-02-15 00:00

Credits

Vincent Koc (@vincentkoc)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
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                  },
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-09T18:11:57.553824Z",
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      ],
      "metrics": [
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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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-Q447-RJ3R-2CGH

Summary

Details

Impact

Patch details (implemented)

Tests

Remediation

Credits

brew-openclaw-cli-cve-2026-28478

Vulnerability from osv_homebrew

Summary

Details

Impact

Patch details (implemented)

Tests

Remediation

Credits

CVE-2026-28478 (GCVE-0-2026-28478)

Tags

Sightings

Nomenclature

Related by attack behaviour