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Vulnerability record · CVE-2026-56323 · published 22 June 2026

CVE-2026-56323: Information exposure vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.64% · top 51.5% CWE-200 · Information exposure Deferred
8.7CVSS 4.0 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Cap-go/capgo/security/advisories/GHSA-469v-6vw5-hxpq
https://www.vulncheck.com/advisories/capgo-unauthenticated-channel-enumeration-and-app-oracle-via-get-channel-self
https://github.com/Cap-go/capgo/security/advisories/GHSA-469v-6vw5-hxpq

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Source: NIST National Vulnerability Database (record CVE-2026-56323), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.