CVE-2026-56255 | Capgo before 12.128.2 contains a denial of service vulnerabi… | CVSS 4.3 MEDIUM

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.

Metadata

CVE ID: CVE-2026-56255
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-19 21:56 UTC
Published: 2026-06-22 21:04 UTC
Last updated: 2026-06-22 21:04 UTC
Primary CWE: CWE-770
Allocation of Resources Without Limits or Throttling
Vendor / Product: Capgo / Capgo
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
Capgo	Capgo	—	0 < 12.128.2, 12.128.2

Weakness (CWE)

CWE	Source	Description
CWE-770	cna	Allocation of Resources Without Limits or Throttling

CVSS scores (2)

Score	Severity	Version	Source	Vector
5.3	MEDIUM	4.0	cna	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
4.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References (2)

GitHub Security Advisory (GHSA-q2xx-6h9x-43fw) https://github.com/Cap-go/capgo/security/advisories/GHSA-q2xx-6h9x-43fw
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