Vulnerability-Lookup

GHSA-24PQ-V99H-HJ63

Vulnerability from github – Published: 2026-09-21 00:30 – Updated: 2026-09-21 00:30

Details

A flaw has been found in OpenClaw up to 2026.9.5. Affected is the function createCanvasHostHandler of the file extensions/canvas/src/host/server.ts of the component Canvas Host Route. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been published and may be used. Fix suggestion's "streaming/size-limit" was never shipped - latest 2026.9.5 still buffers the whole file via readFile() (src/canvas/serve.runtime.ts:17,114), unlike the sibling WS path which caps at 64KB. The vendor was contacted early about this disclosure.

Severity

4.3 (Medium)


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

2.1 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-94094"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-404"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-20T23:17:03Z",
    "severity": "LOW"
  },
  "details": "A flaw has been found in OpenClaw up to 2026.9.5. Affected is the function createCanvasHostHandler of the file extensions/canvas/src/host/server.ts of the component Canvas Host Route. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been published and may be used. Fix suggestion\u0027s \"streaming/size-limit\" was never shipped - latest 2026.9.5 still buffers the whole file via readFile() (src/canvas/serve.runtime.ts:17,114), unlike the sibling WS path which caps at 64KB. The vendor was contacted early about this disclosure.",
  "id": "GHSA-24pq-v99h-hj63",
  "modified": "2026-09-21T00:30:25Z",
  "published": "2026-09-21T00:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94094"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-94094"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/882009"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/408023"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/408023/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-94094 (GCVE-0-2026-94094)

Vulnerability from cvelistv5 – Published: 2026-09-20 23:00 – Updated: 2026-09-22 15:41

Title

OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service

Summary

Severity

5.3 (Medium)


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

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-22 15:30 UTC

CWE

CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/408023	vdb-entrytechnical-description
https://vuldb.com/vuln/408023/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-94094	third-party-advisory
https://vuldb.com/submit/882009	third-party-advisory
https://github.com/lche511/cve/tree/main/OpenClaw…	exploit

Impacted products

1 product

Vendor	Product	Version
n/a	OpenClaw	Affected: 2026.9.0 Affected: 2026.9.1 Affected: 2026.9.2 Affected: 2026.9.3 Affected: 2026.9.4 Affected: 2026.9.5 cpe:2.3:a:openclaw:openclaw::::::::

Credits

pengguogood (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
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          ],
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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.

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-24PQ-V99H-HJ63

CVE-2026-94094 (GCVE-0-2026-94094)

Tags

Sightings

Nomenclature

Related by attack behaviour