CVE-2026-33228
WebReflection flatted, Red Hat Developer Hub 1.8, Red Hat Developer Hub 1.9 취약점
- 대응 우선순위
- 점검
- CVSS
- 8.9
- EPSS
- 0.70% 백분위 48.7% · 2026.06.27 기준
- CISA KEV
- 미등록
- 조치 기한
- -
- 공개일
- 2026.03.21
CVSS 위험도가 높아 영향 여부를 우선 점검할 취약점
flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key "__proto__" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property...
공급사 WebReflection
제품 flatted, Red Hat Developer Hub 1.8, Red Hat Developer Hub 1.9
영향 버전 < 3.4.2
수정 버전 3.4.2
CVSS 벡터 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE CWE-1321, CWE-915
EPSS 데이터 기준일 2026.06.27