vulnerability
Arch Linux: Content spoofing (CVE-2019-16254)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Nov 26, 2019 | Jul 11, 2025 | Mar 25, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Nov 26, 2019
Added
Jul 11, 2025
Modified
Mar 25, 2026
Description
It has been discovered that Ruby before 2.4.8, 2.5.7 and 2.6.5 is vulnerable to HTTP response splitting in WEBrick bundled with Ruby. 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.
This is the same issue as CVE-2017-17742. The previous fix was incomplete, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.
This is the same issue as CVE-2017-17742. The previous fix was incomplete, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.
Solution
arch-linux-upgrade-latest
References
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.