Vulnerability in Capgo
CVE-2026-56328
Capgo before 12.128.2 allows multiple public channels for the same app and platform to coexist simultaneously, while unnamed /updates requests without defaultChannel implicitly resolve to a single hidden winner channel. An authorized app or channel manager can create ambiguous default update state and silently influence which bundle unnamed clients receive, breaking release routing integrity and predictability.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-3cmp-pm5x-8464 (vendor-advisory)
- www.vulncheck.com/advisories/capgo-integrity-issue-in-release-routing-via-multi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56328?
- CVE-2026-56328 is a medium-severity vulnerability in Capgo, classified under Always-Incorrect Control Flow Implementation. CVSS score: 6.5/10. Published 2026-06-30.
- How severe is CVE-2026-56328?
- Medium severity. CVSS v3 base score is 6.5 out of 10.