---
id: CVE-2026-123319
title: >-
  In JetBrains Ktor before 3.6.1 missing Domain attribute validation in client
  cookie storage allowed cookie injection
summary: >-
  In JetBrains Ktor before 3.6.1 missing Domain attribute validation in client
  cookie storage allowed cookie injection
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-565
vendor: JetBrains
product: Ktor
affected:
  - Ktor < 3.6.1
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T10:28:05.274Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123319'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.351Z'
---

## Overview

In JetBrains Ktor before 3.6.1 missing Domain attribute validation in client cookie storage allowed cookie injection

## Affected

- `Ktor < 3.6.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.