Detections
Analytics
SCA: security update for flatted (GHSA-rf6f-7fwh-wjgh)
critical Tenable Cloud Security Plugin ID 472850
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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 will pollute the
global prototype. This issue has been patched in version 3.4.2. (CVE-2026-33228)
Solution
Update the flatted library and its related packages to version 3.4.2 or later.See Also
Plugin Details
Severity: Critical
ID: 472850
Version: Revision 1.1
Type: Local
Family: SCA Checks
Published: 10/5/2026
Updated: 10/5/2026
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 58.29
Vendor
Vendor Severity: High
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-33228
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.9
Threat Vector: CVSS:4.0/E:P
Vector: 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
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 3/19/2026
Vulnerability Publication Date: 3/19/2026
Reference Information
CVE: CVE-2026-33228