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Vulnerability record · CVE-2019-12736 · published 2 October 2019

CVE-2019-12736: Jetbrains ktor command injection vulnerability

Jetbrains · Ktor

JetBrains Ktor framework before 1.2.0-rc does not sanitize the username provided by the user for the LDAP protocol, leading to command injection.

9.8 CVSS 3.1 Critical EPSS 2.2% · top 18.0% CWE-77 · Command injection
9.8CVSS 3.1 base score, v2 7.5
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

JetBrains Ktor framework before 1.2.0-rc does not sanitize the username provided by the user for the LDAP protocol, leading to command injection.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.jetbrains.com/blog/2019/09/26/jetbrains-security-bulletin-q2-2019/ Vendor Advisory
https://blog.jetbrains.com/blog/2019/09/26/jetbrains-security-bulletin-q2-2019/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-45612Jetbrains ktor xml external entity (xxe) vulnerabilityIn JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXEEPSS 0.60%9.1CVE-2023-45613Jetbrains ktor improper certificate validation vulnerabilityIn JetBrains Ktor before 2.3.5 server certificates were not verifiedEPSS 0.30%8.1CVE-2019-10102Jetbrains kotlin cleartext transmission vulnerabilityJetBrains Ktor framework (created using the Kotlin IDE template) versions before 1.1.0 were resolving artifacts using an http connection during the b…EPSS 0.82%7.5CVE-2022-48476Jetbrains ktor path traversal vulnerabilityIn JetBrains Ktor before 2.3.0 path traversal in the `resolveResource` method was possibleEPSS 0.75%7.5CVE-2021-43203Jetbrains ktor improper authentication vulnerabilityIn JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly.EPSS 0.86%7.5CVE-2020-5207Jetbrains ktor http request smuggling vulnerabilityIn Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or …EPSS 0.76%6.5CVE-2022-38180Jetbrains ktor improper authentication vulnerabilityIn JetBrains Ktor before 2.1.0 the wrong authentication provider could be selected in some casesEPSS 0.72%6.5CVE-2020-26129Jetbrains ktor http request smuggling vulnerabilityIn JetBrains Ktor before 1.4.1, HTTP request smuggling was possible.EPSS 0.77%

Source: NIST National Vulnerability Database (record CVE-2019-12736), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.