CVE-2020-5207 - Request smuggling is possible in Ktor when both chunked TE and content length specified

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HIGH

Request smuggling is possible in Ktor when both chunked TE and content length specified

Published Jan 27, 2020

7.5

HIGH

CVSS 3.1

EPSS 0.76%

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.

Affected products

Vendor Ktor.io Product Ktor Default
n/a
- Version
  < 1.3.0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Ktor.io

Ktor

n/a

Version	Status	Constraints
< 1.3.0	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-444

References (4)

https://github.com/advisories/GHSA-xrr9-rh8p-433v
Advisory
https://github.com/ktorio/ktor/pull/1547
x_refsource_MISCPatchThird Party Advisory
https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433v
x_refsource_CONFIRMThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2020-5207

Link	Providers	Tags
https://github.com/advisories/GHSA-xrr9-rh8p-433v		Advisory
https://github.com/ktorio/ktor/pull/1547		x_refsource_MISCPatchThird Party Advisory
https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433v		x_refsource_CONFIRMThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2020-5207

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner GitHub_M

Published Jan 27, 2020

Updated Aug 4, 2024

Reserved Jan 2, 2020

Link CVE-2020-5207

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-5207

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-5207

GHSA-XRR9-RH8P-433V