Detections
Analytics

SCA: security update for elysia (GHSA-hxj9-33pp-j2cc)

critical Tenable Cloud Security Plugin ID 436313

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation and client-
 server communication. Versions 1.4.0 through 1.4.16 contain a prototype pollution vulnerability in
 `mergeDeep` after merging results of two standard schema validations with the same key. Due to the
 ordering of merging, there must be an any type that is set as a standalone guard, to allow for the
 `__proto__ prop` to be merged. When combined with GHSA-8vch-m3f4-q8jf this allows for a full RCE by an
 attacker. This issue is fixed in version 1.4.17. To workaround, remove the `__proto__ key` from body.
 (CVE-2025-66456)

See Also

https://github.com/advisories/GHSA-hxj9-33pp-j2cc

Plugin Details

Severity: Critical

ID: 436313

Version: Revision 1.10

Type: Local

Family: SCA Checks

Published: 12/9/2025

Updated: 6/30/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

Vendor

Vendor Severity: Critical

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-2025-66456

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: 9.1

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/9/2025

Vulnerability Publication Date: 12/9/2025

Reference Information

CVE: CVE-2025-66456