CVE-2020-5216

In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into append/override_content_security_policy_directives, a newline could be injected leading to limited header injection. Upon seeing a newline in the header, rails will silently create a new Content-Security-Policy header with the remaining value of the original string. It will continue to create new headers for each newline. This has been fixed in 6.3.0, 5.2.0, and 3.9.0.

• CWE-113
• CWE-74

• https://github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0Patch
• https://github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwgExploit, Mitigation, Third Party Advisory
• https://github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0Patch
• https://github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwgExploit, Mitigation, Third Party Advisory

Published

Jan 23, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-5210In NetHack before 3.6.5, an invalid argument to the -w comma…7.8
• CVE-2020-5211In NetHack before 3.6.5, an invalid extended command in valu…9.8
• CVE-2020-5212In NetHack before 3.6.5, an extremely long value for the MEN…9.8
• CVE-2020-5213In NetHack before 3.6.5, too long of a value for the SYMBOL …9.8
• CVE-2020-5214In NetHack before 3.6.5, detecting an unknown configuration …9.8
• CVE-2020-5215In TensorFlow before 1.15.2 and 2.0.1, converting a string (…7.5
• CVE-2020-5217In Secure Headers (RubyGem secure_headers), a directive inje…5.8
• CVE-2020-5218Affected versions of Sylius give attackers the ability to sw…4.3
• CVE-2020-5219Angular Expressions before version 1.0.1 has a remote code e…8.8
• CVE-2020-5220Sylius ResourceBundle accepts and uses any serialisation gro…5.3
• CVE-2020-5221In uftpd before 2.11, it is possible for an unauthenticated …7.2
• CVE-2020-5222Opencast before 7.6 and 8.1 enables a remember-me cookie bas…8.8