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CVE-2019-19389

18
FAUCET Score

CVE-2019-19389 describes an HTTP Response Splitting vulnerability in the JetBrains Ktor framework prior to version 1.2.6. This medium-severity vulnerability (CVSS 5.4) can be exploited with low attack complexity and user interaction, potentially leading to limited impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.6CPE matchmatch criteria
cpe:2.3:a:jetbrains:ktor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 89th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

gist.github.com / JLLeitschuh/6792947ed57d589b08c1cc8b666c7737
ExploitThird Party Advisory
github.com / ktorio/ktor/pull/1408
MitigationPatchThird Party Advisory
twitter.com / JLLeitschuh/status/1210256191110230017
ExploitThird Party Advisory