CVE-2026-56335 | Capgo before 12.128.2 contains an authorization bypass vulne… | CVSS 6.5 MEDIUM

Description

Capgo before 12.128.2 contains an authorization bypass vulnerability where write-scoped API keys can directly mutate protected channel configuration fields through PostgREST by exploiting a null authentication check in the immutability trigger. Attackers with write API keys can modify sensitive channel attributes such as public, allow_emulator, and security-related flags outside intended application routes.

Metadata

CVE ID: CVE-2026-56335
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 13:13 UTC
Published: 2026-07-10 13:57 UTC
Last updated: 2026-07-10 14:56 UTC
Primary CWE: CWE-284
Improper Access Control
Vendor / Product: Capgo / Capgo
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

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

Weakness (CWE)

CWE	Source	Description
CWE-284	cna	Improper Access Control

CVSS scores (2)

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

References (2)

GitHub Security Advisory (GHSA-ph9c-vwjq-pqhj) https://github.com/Cap-go/capgo/security/advisories/GHSA-ph9c-vwjq-pqhj
VulnCheck Advisory: Capgo - Channel Configuration Mutation via Write-Scoped API Keys https://www.vulncheck.com/advisories/capgo-channel-configuration-mutation-via-write-scoped-api-keys