CVE-2026-56255 Details
Description
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.
A denial-of-service vulnerability has been identified in Capgo versions prior to 12.128.2. The issue resides in the POST /app/demo endpoint, where authenticated users with organization write permissions can create an unlimited number of demo applications. This process is not subject to any rate limiting or quota enforcement. Each request generates approximately 138 database write operations, leading to degraded performance, increased costs, and potential service instability.
Users are advised to update to Capgo version 12.128.2 or later. Additionally, implementing per-user and per-organization rate limiting on the /app/demo endpoint, enforcing plan quotas before app creation, and moving heavy demo data generation to an asynchronous job with server-side caps can help mitigate this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 22, 2026CISA-ADP
Assessed Jun 23, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Cap-go/capgo/security/advisories/GHSA-q2xx-6h9x-43fw | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/Cap-go/capgo/security/advisories/GHSA-q2xx-6h9x-43fw | [email protected] | AdvisoryRemedyVendor |
| https://www.vulncheck.com/advisories/capgo-denial-of-service-via-unlimited-demo-app-creation | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Capgo | < 12.128.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 23, 2026 | CVE Modified | CISA-ADP |
| Jun 22, 2026 | New CVE Received | [email protected] |