Is CVE-2026-56255 in the CISA KEV catalog?

No. CVE-2026-56255 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-56255?

CVE-2026-56255 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-56255?

CVE-2026-56255 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-56255?

No published fix for CVE-2026-56255 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-56255

MEDIUM

4.3

CVSS v3

NVD

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.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-23.