{"id":"CVE-2026-56299","title":"Capgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload Endpoint","summary":"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 aut…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-306"],"vendor":"Capgo","product":"Capgo","affected":["Capgo < 12.128.2"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-06-23T14:00:21.259811Z"},"published":"2026-06-21","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:05:55.917Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56299","references":[{"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-6c7m-4223-446j","label":"GitHub Security Advisory (GHSA-6c7m-4223-446j)"},{"url":"https://www.vulncheck.com/advisories/capgo-denial-of-service-via-unauthenticated-options-request-to-build-upload-endpoint","label":"VulnCheck Advisory: Capgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload Endpoint"}],"tags":["cve.org"],"epss":0.00683,"epssPercentile":0.52789,"ingestedAt":"2026-11-08T14:51:22.358Z","slug":"CVE-2026-56299","body":"## Overview\n\nCapgo 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.\n\n## Affected\n\n- `Capgo < 12.128.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}