CVE-2020-5207

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

In 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 doesn't handle \n as a headers separator.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-444

Affected software

Vendor	Product	Versions
Ktor.io	Ktor	< 1.3.0

References

https://github.com/ktorio/ktor/pull/1547Patch, Third Party Advisory
https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433vThird Party Advisory
https://github.com/ktorio/ktor/pull/1547Patch, Third Party Advisory
https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433vThird Party Advisory

Timeline

Published: Jan 27, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-52088.8It's been found that multiple functions in ipmitool before 1.8.19 neglect proper checking of the data received from a remote LAN party, whic CVE-2020-52097.8In NetHack before 3.6.5, unknown options starting with -de and -i can cause a buffer overflow resulting in a crash or remote code execution/CVE-2020-52107.8In NetHack before 3.6.5, an invalid argument to the -w command line option can cause a buffer overflow resulting in a crash or remote code e CVE-2020-52119.8In NetHack before 3.6.5, an invalid extended command in value for the AUTOCOMPLETE configuration file option can cause a buffer overflow res CVE-2020-52129.8In NetHack before 3.6.5, an extremely long value for the MENUCOLOR configuration file option can cause a buffer overflow resulting in a cras CVE-2020-52139.8In NetHack before 3.6.5, too long of a value for the SYMBOL configuration file option can cause a buffer overflow resulting in a crash or re CVE-2020-52149.8In NetHack before 3.6.5, detecting an unknown configuration file option can cause a buffer overflow resulting in a crash or remote code exec CVE-2020-52157.5In TensorFlow before 1.15.2 and 2.0.1, converting a string (from Python) to a tf.float16 value results in a segmentation fault in eager mode CVE-2020-52165.8In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If us CVE-2020-52175.8In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If us CVE-2020-52184.3Affected versions of Sylius give attackers the ability to switch channels via the _channel_code GET parameter in production environments. Th CVE-2020-52198.8Angular Expressions before version 1.0.1 has a remote code execution vulnerability if you call expressions.compile(userControlledInput) wher