CVE-2026-56322

HIGH 8.7

Published 2026-06-23 · Last modified 2026-06-23

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.

ELEVATED IMPACT

Severe if exploited (CVSS 8.7), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 25th percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

8.7CVSS 4.0 · HIGH

ConfidentialityHigh
IntegrityNone
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable
✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Affected

Vendors Capgo

Products Capgo

Weakness (CWE)

CWE-200: Information exposure

CVSS vector

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

References

Advisories

https://github.com/Cap-go/capgo/security/advisories/GHSA-pgmr-gw53-7f77 vendor-advisory
https://www.vulncheck.com/advisories/capgo-information-disclosure-via-unauthenticated-updates-defaultchannel-parameter third-party-advisory

Sources: NVD · CVE.org · EPSS