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01 Record

CVE-2020-5207

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

MediumPUBLISHEDCNA: GitHub_M
CNA base score5.4 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.76% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 54.8% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-01-27 19:30Z6 YR AGO
Last updated
2024-08-04 08:22Z2 YR AGO
Reserved
2020-01-02
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 5.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base
Data version
5.1
Document digest
edba0aeefe20eee38363dea1dc6e24851604e8c328708e2395bf464157af41a1

05 Affected products

VendorProductVersionsPlatforms
Ktor.ioKtor< 1.3.0—

06 References