SB2026072610 - Prototype pollution in JavaScript Cookie

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026072610

SB2026072610 - Prototype pollution in JavaScript Cookie

Published: July 26, 2026

Security Bulletin ID SB2026072610
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Prototype pollution (CVE-ID: CVE-2026-46625)

CWE-ID: CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes (\'Prototype Pollution\')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to inject cookie attributes.

The vulnerability exists due to improperly controlled modification of object prototype attributes in the assign() helper when processing a JSON-derived attributes object. A remote attacker can supply a specially crafted object containing a __proto__ property to inject cookie attributes.

This issue affects applications that pass attacker-influenced JSON-derived objects as the attributes argument to Cookies.set, Cookies.remove, Cookies.withAttributes, or Cookies.withConverter.


Remediation

Install update from vendor's website.

References