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Servers and applications

CVE-2019-16254

Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. NOTE: this issue exists because of an incomplete fix for CVE-2017-17742, which addressed the CRLF…

Severity
Medium 5.3
Published
26 Nov 2019
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
RubyServers and applications · cpe:a:ruby-lang:ruby
  • Every version up to 2.3.0
  • From 2.4.0 up to 2.4.7
  • From 2.5.0 up to 2.5.6
  • From 2.6.0 up to 2.6.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-16254
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-16254