CVE-2015-2156: Lightbend Play Framework

High severity, CVSS 7.5. EPSS: 5.2% chance of exploitation in the next 30 days.

Netty before 3.9.8.Final, 3.10.x before 3.10.3.Final, 4.0.x before 4.0.28.Final, and 4.1.x before 4.1.0.Beta5 and Play Framework 2.x before 2.3.9 might allow remote attackers to bypass the httpOnly flag on cookies and obtain sensitive information by leveraging improper validation of cookie name and value characters.

Affected products

• Lightbend Play Framework: version 2.0 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; version 2.0.5 only; version 2.0.6 only; …
• Netty Netty: up to and including 3.9.7; version 3.10.0 only; version 3.10.1 only; version 3.10.2 only; version 4.0.0 only; version 4.0.1 only; …
• Playframework Play Framework: version 2.0 only; version 2.0.1 only; version 2.1.1 only; version 2.1.2 only; version 2.1.3 only; version 2.1.4 only; …

Published 2017-10-18. Last modified 2026-06-17.