URL Redirection to Untrusted Site (Open Redirect) in Ktor

MEDIUM 6.1CVE-2019-19703 · GHSA-xwgq-pcqx-hpmv · Published 10/12/2019 · updated 17/06/2026

In short

CVE-2019-19703 is a MEDIUM (CVSS 6.1) vulnerability affecting io.ktor:ktor-client-core, ktor (jetbrains).
Chance of exploitation in the next 30 days (EPSS): 0.64%, higher than 50.8% of all vulnerabilities.
Fix: update to 1.3.0 or later.

Package	Affected versions	Patched versions
io.ktor:ktor-client-core Maven	`< 1.3.0`	`1.3.0`
ktor jetbrains	`≤ 1.2.6`	No fix yet

In Ktor through 1.2.6, the client resends data from the HTTP Authorization header to a redirect location.

NVD description

In Ktor through 1.2.6, the client resends data from the HTTP Authorization header to a redirect location.

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