CVE-2026-56299
Capgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload Endpoint
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
Capgo before 12.128.2 contains an authentication bypass vulnerability in the /build/upload/:jobId/* endpoint that allows unauthenticated attackers to trigger consistent 500 errors. Remote attackers can send OPTIONS requests to bypass authentication middleware and invoke tusProxy logic with invalid credentials, enabling trivial request flooding and denial of service.
| CWE | CWE-306 |
| Vendor | capgo |
| Product | capgo |
| Published | Jun 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Capgo / Capgo
0 < 12.128.2
References
Credits
🔍 Judel777