CVE-2026-56322 | THREATINT

Description

Capgo before 12.128.2 contains an information disclosure vulnerability in the unauthenticated /updates endpoint that resolves the defaultChannel parameter before enforcing privacy restrictions, allowing attackers to enumerate private channels and leak version/config state. Unauthenticated attackers can probe private channel names and distinguish valid channels from nonexistent ones based on response differences, revealing assigned bundle versions and platform-specific configuration details.

PUBLISHED Reserved 2026-06-20 | Published 2026-06-23 | Updated 2026-06-23 | Assigner VulnCheck

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem types

Exposure of Sensitive Information to an Unauthorized Actor

Product status

Default status

unaffected

Any version before 12.128.2

affected

12.128.2 (semver)

unaffected

Credits

Judel777 reporter

References

github.com/.../capgo/security/advisories/GHSA-pgmr-gw53-7f77 exploit

github.com/.../capgo/security/advisories/GHSA-pgmr-gw53-7f77 (GitHub Security Advisory (GHSA-pgmr-gw53-7f77)) vendor-advisory

www.vulncheck.com/...icated-updates-defaultchannel-parameter (VulnCheck Advisory: Capgo - Information Disclosure via Unauthenticated /updates defaultChannel Parameter) third-party-advisory

cve.org (CVE-2026-56322)

nvd.nist.gov (CVE-2026-56322)

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