CVE-2026-56306
Capgo - Subkey Enforcement Bypass via x-limited-key-id Header Parsing
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
Capgo before 12.128.2 contains a weak parsing vulnerability in the x-limited-key-id header that allows attackers to bypass subkey enforcement by submitting malformed values, zero, or duplicate headers that result in NaN or falsy values. Remote attackers can manipulate the x-limited-key-id header to disable limited key scoping and execute requests using the main API key context instead of restricted subkey permissions.
| CWE | CWE-20 |
| Vendor | capgo |
| Product | capgo |
| Published | Jun 22, 2026 |
Stay Ahead of the Next One
Get instant alerts for capgo capgo
Be the first to know when new medium vulnerabilities affecting capgo capgo are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Capgo / Capgo
0 < 12.128.2
References
Credits
🔍 Judel777