CVE-2026-46625
Description
A flaw was found in JavaScript Cookie (js-cookie). This vulnerability allows a remote attacker to manipulate cookie attributes by exploiting a prototype pollution issue within the assign() helper function. When processing specially crafted JSON input, the flaw enables an attacker to hijack the prototype of a cookie's attribute object. This allows the attacker to set sensitive cookie attributes such as domain, secure, samesite, expires, and path, potentially leading to security bypasses or session manipulation.
Statement
Important: This flaw in the js-cookie JavaScript library allows for cookie attribute manipulation via prototype pollution. When applications process untrusted JSON data with affected versions of js-cookie, an attacker could control sensitive cookie properties such as domain or secure, potentially leading to session fixation or other client-side security bypasses.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Application Data
An attacker could modify sensitive data or program variables.
Integrity
Technical Impact: Execute Unauthorized Code or Commands
Other,Integrity
Technical Impact: Varies by Context; Alter Execution Logic
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