CVE-2026-56323

Capgo - Unauthenticated Channel Enumeration and App Oracle via GET /channel_self

State: Published
Severity: 8.7 High
Published: Jun 22, 2026
Updated: Jun 23, 2026
Reserved: Jun 20, 2026

Description

Capgo before 12.128.2 contains an information disclosure vulnerability in the /functions/v1/channel_self endpoint that allows unauthenticated attackers to enumerate non-public channel names and determine app existence and subscription status. Remote attackers can send GET requests with arbitrary app_id parameters to disclose internal rollout channels, enumerate valid applications across tenants, and leak billing status without authentication or device binding.

Scores

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

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
CapgoCapgo	before 12.128.2Affected 12.128.2Not affected

References

GitHub Security Advisory (GHSA-469v-6vw5-hxpq)vendor-advisory
VulnCheck Advisory: Capgo - Unauthenticated Channel Enumeration and App Oracle via GET /channel_selfthird-party-advisory

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