Capgo - Denial of Service via Unlimited Demo App Creation

Capgo before 12.128.2 contains a denial of service vulnerability in the POST /app/demo endpoint that allows authenticated users with org write permissions to create unlimited demo applications without rate limiting or quota enforcement. Attackers can repeatedly invoke this endpoint to generate approximately 138 database write operations per request, causing degraded performance, increased costs, and potential service instability.

Problem type

Allocation of Resources Without Limits or Throttling

Affected products

Capgo

Capgo

< 12.128.2 - AFFECTED

12.128.2 - UNAFFECTED

References

GitHub Security Advisory (GHSA-q2xx-6h9x-43fw)

https://github.com/Cap-go/capgo/security/advisories/GHSA-q2xx-6h9x-43fw

vendor-advisory

VulnCheck Advisory: Capgo - Denial of Service via Unlimited Demo App Creation

https://www.vulncheck.com/advisories/capgo-denial-of-service-via-unlimited-demo-app-creation

third-party-advisory

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-56255

Click to expand

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-56255",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-06-22T21:04:44.059Z",
    "dateReserved": "2026-06-19T21:56:09.656Z",
    "datePublished": "2026-06-22T21:04:44.059Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-06-22T21:04:44.059Z"
      },
      "datePublic": "2026-03-03T00:00:00.000Z",
      "title": "Capgo - Denial of Service via Unlimited Demo App Creation",
      "descriptions": [
        {
          "lang": "en",
          "value": "Capgo before 12.128.2 contains a denial of service vulnerability in the POST /app/demo endpoint that allows authenticated users with org write permissions to create unlimited demo applications without rate limiting or quota enforcement. Attackers can repeatedly invoke this endpoint to generate approximately 138 database write operations per request, causing degraded performance, increased costs, and potential service instability."
        }
      ],
      "affected": [
        {
          "vendor": "Capgo",
          "product": "Capgo",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "12.128.2"
            },
            {
              "version": "12.128.2",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Allocation of Resources Without Limits or Throttling",
              "cweId": "CWE-770",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-q2xx-6h9x-43fw",
          "name": "GitHub Security Advisory (GHSA-q2xx-6h9x-43fw)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/capgo-denial-of-service-via-unlimited-demo-app-creation",
          "name": "VulnCheck Advisory: Capgo - Denial of Service via Unlimited Demo App Creation",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Judel777",
          "type": "reporter"
        }
      ]
    }
  }
}