{"cve":"CVE-2019-17513","nvd":{"published":"2019-10-18T03:15:09.897","modified":"2026-06-17T02:24:02.450","status":"Modified","description":"An issue was discovered in Ratpack before 1.7.5. Due to a misuse of the Netty library class DefaultHttpHeaders, there is no validation that headers lack HTTP control characters. Thus, if untrusted data is used to construct HTTP headers with Ratpack, HTTP Response Splitting can occur.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-74"],"references":["https://github.com/ratpack/ratpack/commit/c560a8d10cb8bdd7a526c1ca2e67c8f224ca23ae","https://github.com/ratpack/ratpack/commit/efb910d38a96494256f36675ef0e5061097dd77d","https://github.com/ratpack/ratpack/releases/tag/v1.7.5","https://github.com/ratpack/ratpack/security/advisories/GHSA-mvqp-q37c-wf9j","https://ratpack.io/versions/1.7.5"],"products":["ratpack_project:ratpack"],"source":"nvd","synced_at":"2026-10-19T20:59:10.855360465+00:00"},"epss":{"cve":"CVE-2019-17513","score":0.02153,"percentile":0.82155,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mvqp-q37c-wf9j","url":"https://osv.dev/vulnerability/GHSA-mvqp-q37c-wf9j","summary":"io.ratpack:ratpack-core vulnerable to Improper Neutralization of Special Elements in Output ('Injection')","modified":"2026-07-08T05:59:42.800257155Z","packages":[{"ecosystem":"Maven","name":"io.ratpack:ratpack-core","purl":"pkg:maven/io.ratpack/ratpack-core","ranges":["<1.7.5"],"fixed":["1.7.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}