Vulnerability-Lookup

GHSA-66MR-2W7F-R56J

Vulnerability from github – Published: 2026-09-02 21:32 – Updated: 2026-09-02 21:32

Details

A vulnerability was detected in rowboatlabs rowboat up to 0.9.1. The impacted element is the function request.text/req.json of the file apps/rowboat/app/api/composio/webhook/route.ts of the component Composio Webhook Endpoint. The manipulation results in denial of service. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 0.9.2 is sufficient to resolve this issue. Upgrading the affected component is recommended. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind.

Severity

5.3 (Medium)


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

5.5 (Medium)


                  
                    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/E:P

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{
  "affected": [],
  "aliases": [
    "CVE-2026-84856"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-404"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T20:17:42Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was detected in rowboatlabs rowboat up to 0.9.1. The impacted element is the function request.text/req.json of the file apps/rowboat/app/api/composio/webhook/route.ts of the component Composio Webhook Endpoint. The manipulation results in denial of service. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 0.9.2 is sufficient to resolve this issue. Upgrading the affected component is recommended. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind.",
  "id": "GHSA-66mr-2w7f-r56j",
  "modified": "2026-09-02T21:32:08Z",
  "published": "2026-09-02T21:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84856"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Report"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-84856"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/886260"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/398131"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/398131/cti"
    }
  ],
  "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:L",
      "type": "CVSS_V3"
    },
    {
      "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/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-2026-84856 (GCVE-0-2026-84856)

Vulnerability from cvelistv5 – Published: 2026-09-02 19:45 – Updated: 2026-09-03 14:31

Title

rowboatlabs rowboat Composio Webhook Endpoint route.ts req.json denial of service

Summary

Severity

6.9 (Medium)


                        
                          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/E:P

5.3 (Medium)


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

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 13:31 UTC

CWE

CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/398131	vdb-entrytechnical-description
https://vuldb.com/vuln/398131/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84856	third-party-advisory
https://vuldb.com/submit/886260	third-party-advisory
https://github.com/hackerguopeng/cve/tree/main/Ro…	exploit
https://github.com/rowboatlabs/rowboat/releases/t…	patch

Impacted products

1 product

Vendor	Product	Version
rowboatlabs	rowboat	Affected: 0.9.0 Affected: 0.9.1 Unaffected: 0.9.2 cpe:2.3:a:rowboatlabs:rowboat::::::::

Credits

hackerguopeng (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-84856",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-03T13:31:43.906524Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
          "dateUpdated": "2026-09-03T14:31:07.910Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:rowboatlabs:rowboat:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Composio Webhook Endpoint"
          ],
          "product": "rowboat",
          "vendor": "rowboatlabs",
          "versions": [
            {
              "status": "affected",
              "version": "0.9.0"
            },
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              "status": "affected",
              "version": "0.9.1"
            },
            {
              "status": "unaffected",
              "version": "0.9.2"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "hackerguopeng (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was detected in rowboatlabs rowboat up to 0.9.1. The impacted element is the function request.text/req.json of the file apps/rowboat/app/api/composio/webhook/route.ts of the component Composio Webhook Endpoint. The manipulation results in denial of service. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 0.9.2 is sufficient to resolve this issue. Upgrading the affected component is recommended. The legacy Next.js app was deleted at 0.9.2 rather than patched, leaving no security control behind."
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      "metrics": [
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            "baseSeverity": "MEDIUM",
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          }
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          "tags": [
            "signature",
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        },
        {
          "name": "CVE-2026-84856 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
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          "url": "https://vuldb.com/cve/CVE-2026-84856"
        },
        {
          "name": "Submit #886260 | Rowboat Labs Rowboat 0.1.0 Denial of Service",
          "tags": [
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          ],
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        },
        {
          "tags": [
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          "url": "https://github.com/hackerguopeng/cve/tree/main/Rowboat_PreAuth_Body_Buffer_DoS_Report"
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          "tags": [
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          "url": "https://github.com/rowboatlabs/rowboat/releases/tag/v0.9.2"
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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.

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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.

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GHSA-66MR-2W7F-R56J

CVE-2026-84856 (GCVE-0-2026-84856)

Tags

Sightings

Nomenclature

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