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 vector, but did not address an isolated CR or an isolated LF.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2007-1 ruby2.1 security update
Debian DLA Debian DLA DLA-2027-1 jruby security update
Debian DLA Debian DLA DLA-2330-1 jruby security update
Debian DLA Debian DLA DLA-3408-1 jruby security update
Debian DSA Debian DSA DSA-4586-1 ruby2.5 security update
Debian DSA Debian DSA DSA-4587-1 ruby2.3 security update
EUVD EUVD EUVD-2019-7060 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 vector, but did not address an isolated CR or an isolated LF.
Ubuntu USN Ubuntu USN USN-4201-1 Ruby vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00729}

epss

{'score': 0.00575}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T01:10:41.699Z

Reserved: 2019-09-11T00:00:00

Link: CVE-2019-16254

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-11-26T18:15:15.210

Modified: 2024-11-21T04:30:23.863

Link: CVE-2019-16254

cve-icon Redhat

Severity : Low

Publid Date: 2019-10-25T00:00:00Z

Links: CVE-2019-16254 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses