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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…
Medium5.3EPSS 4.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 4.6% · top 8.3% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
n/a
- affected n/a
References (16)
- https://hackerone.com/reports/331984 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html (opens in a new tab)x_transferred
- https://www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/ (opens in a new tab)x_transferred
- https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/ (opens in a new tab)x_transferred
- https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/ (opens in a new tab)x_transferred
- https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/ (opens in a new tab)x_transferred
- [debian-lts-announce] 20191210 [SECURITY] [DLA 2027-1] jruby security update (opens in a new tab)mailing-listx_transferred
- 20191217 [SECURITY] [DSA 4587-1] ruby2.3 security update (opens in a new tab)mailing-listx_transferred
- 20191217 [SECURITY] [DSA 4586-1] ruby2.5 security update (opens in a new tab)mailing-listx_transferred
- DSA-4587 (opens in a new tab)vendor-advisoryx_transferred
- DSA-4586 (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpujan2020.html (opens in a new tab)x_transferred
- GLSA-202003-06 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2020:0395 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20200816 [SECURITY] [DLA 2330-1] jruby security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20230430 [SECURITY] [DLA 3408-1] jruby security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-16254)Record last updated .