CVE-2019-19389
Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) in Ktor
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
- Record
CVE-2019-19389- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
CVE List No score
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
- Record
CVE-2019-19389- Updated
- 2026-11-02
EUVDEUVD-2019-9010 No score
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
- Record
EUVD-2019-9010- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rm67-h645-8jg2 No score
Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) in Ktor
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
- Record
GHSA-rm67-h645-8jg2- Updated
- 2026-11-02
OSV
JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.
- Record
CVE-2019-19389- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-19389 is a medium vulnerability (CVSS 5.4) in Jetbrains Ktor, published December 26, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. No source names a fixed version.
References
github.com/ktorio/ktor/pull/1408
gist.github.com/JLLeitschuh/6792947ed57d589b08c1cc8b666c7737
twitter.com/JLLeitschuh/status/1210256191110230017?s=20
nvd.nist.gov/vuln/detail/CVE-2019-19389
blog.jetbrains.com