In JetBrains Ktor before 3.6.1 session forgery was possible via tampered encrypted session cookies

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Jetbrains
  • Ktor

No data.

No data.

References
Link Providers
https://www.jetbrains.com/privacy-security/issues-fixed/ cve-icon cve-icon
History

Fri, 06 Nov 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains ktor
Vendors & Products Jetbrains
Jetbrains ktor

Fri, 06 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
Title Session Forgery via Tampered Encrypted Cookies in JetBrains Ktor

Fri, 06 Nov 2026 10:30:00 +0000

Type Values Removed Values Added
Description In JetBrains Ktor before 3.6.1 session forgery was possible via tampered encrypted session cookies
Weaknesses CWE-354
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: JetBrains

Published: 2026-11-06T10:28:04.482Z

Updated: 2026-11-06T10:28:04.482Z

Reserved: 2026-11-05T18:38:26.216Z

Link: CVE-2026-123317

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-06T11:17:11.170

Modified: 2026-11-06T11:17:11.170

Link: CVE-2026-123317

cve-icon Redhat

No data.