DoS Vulnerability in JetBrains Ktor WebSocket Decompression
CVE-2026-68762

5.9MEDIUM

Key Information:

Vendor

Jetbrains
Status
Ktor
Vendor
CVE Published:
17 August 2026

What is CVE-2026-68762?

A potential Denial of Service vulnerability exists in JetBrains Ktor prior to version 3.4.1, which allows attackers to exploit WebSocket decompression mechanisms. By sending specially crafted requests, malicious actors could cause the server to become unresponsive, impacting availability for legitimate users.

Affected Version(s)

Ktor 0 < 3.4.1

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.