Detections
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Echo: js-cookie: security update to 2.2.1+echo.1

high Tenable Cloud Security Plugin ID 458891

Description

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

 - JavaScript Cookie is a JavaScript API for handling cookies, client-side. Prior to version 3.0.7, js-
 cookie's internal assign() helper copies properties with for...in + plain assignment. When the source
 object is produced by JSON.parse, the JSON object's "__proto__" member is an own enumerable property, so
 the for…in enumerates it and the target[key] = source[key] write triggers the Object.prototype.__proto__
 setter on the fresh target ({}). The result is a per-instance prototype hijack: Object.prototype itself is
 untouched, but the merged attributes object now inherits attacker-controlled keys. Because the consuming
 set() function then enumerates the merged object with another for...in, every key the attacker placed on
 the polluted prototype lands in the resulting Set-Cookie string as an attribute pair. The attacker can set
 domain=, secure=, samesite=, expires=, and path= on cookies whose attributes the developer thought were
 locked down. This issue has been patched in version 3.0.7. (CVE-2026-46625)

Solution

Update the js-cookie library and its related packages to version 2.2.1+echo.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-46625

Plugin Details

Severity: High

ID: 458891

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.7

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2026-46625

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/31/2026

Vulnerability Publication Date: 5/21/2026

Reference Information

CVE: CVE-2026-46625