URL Redirection to Untrusted Site (Open Redirect) in Ktor
In Ktor through 1.2.6, the client resends data from the HTTP Authorization header to a redirect location.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.ktor:ktor-client-core | < 1.3.0 | 1.3.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-601- Platform
- Java / Kotlin (Maven)
- Package
io.ktor:ktor-client-core- Disclosed
- 12.02.2020
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-xwgq-pcqx-hpmv - CC BY 4.0
Vulnerability history: io.ktor:ktor-client-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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