CVE-2026-56248 | Cap-go capgo (capgo-backend) before 12.128.12 contains an un… | CVSS 7.5 HIGH

Description

Cap-go capgo (capgo-backend) before 12.128.12 contains an unauthenticated denial-of-service vulnerability arising from the audit_logs table's Row-Level Security (RLS) policy when accessed via the Supabase PostgREST API. Because the PostgreSQL query planner executes costly logic before RLS rejection, unfiltered queries to the public.audit_logs endpoint using the public anon key consistently trigger statement timeouts (PostgREST error 57014). Under concurrency, this exhausts database resources and causes cascading HTTP 500 failures on unrelated endpoints (e.g. /orgs), resulting in an application-layer denial of service.

Metadata

CVE ID: CVE-2026-56248
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-19 21:53 UTC
Published: 2026-06-23 12:12 UTC
Last updated: 2026-06-23 13:25 UTC
Primary CWE: CWE-400
Uncontrolled Resource Consumption
Vendor / Product: Cap-go / capgo
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Cap-go	capgo	—	0 < 12.128.12, 12.128.12

Weakness (CWE)

CWE	Source	Description
CWE-400	cna	Uncontrolled Resource Consumption

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (2)

GitHub Security Advisory (GHSA-5vgv-rqj5-5748) https://github.com/Cap-go/capgo/security/advisories/GHSA-5vgv-rqj5-5748
VulnCheck Advisory: Capgo - Unauthenticated Denial-of-Service via audit_logs RLS Policy https://www.vulncheck.com/advisories/capgo-unauthenticated-denial-of-service-via-audit-logs-rls-policy