What is CVE-2020-26129?

CVE-2020-26129 is a medium-severity vulnerability in Jetbrains Ktor, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 6.5/10. Published 2020-11-16.

How severe is CVE-2020-26129?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-26129 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Jetbrains Ktor

CVE-2020-26129

In JetBrains Ktor before 1.4.1, HTTP request smuggling was possible.

Vulnerability class: HTTP Request Smuggling

EPSS: 0.008 (51.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Jetbrains Ktor
N/a — versions n/a

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

Public proof-of-concept exploits

mo-xiaoxi/HDiff

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2020-26129?: CVE-2020-26129 is a medium-severity vulnerability in Jetbrains Ktor, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 6.5/10. Published 2020-11-16.
How severe is CVE-2020-26129?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-26129 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.