Medium severity4.4NVD Advisory· Published Jan 23, 2020· Updated Jun 17, 2026
CVE-2020-5216
CVE-2020-5216
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
secure_headersRubyGems | >= 6.0.0, < 6.3.0 | 6.3.0 |
secure_headersRubyGems | >= 5.0.0, < 5.2.0 | 5.2.0 |
secure_headersRubyGems | < 3.9.0 | 3.9.0 |
Affected products
3- Twitter/secure_headersv5Range: < 3.9.0
Patches
Vulnerability mechanics
References
5- github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0nvdPatchWEB
- github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwgnvdExploitMitigationThird Party AdvisoryWEB
- github.com/advisories/GHSA-w978-rmpf-qmwgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-5216ghsaADVISORY
- github.com/rubysec/ruby-advisory-db/blob/master/gems/secure_headers/CVE-2020-5216.ymlghsaWEB
News mentions
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