CVE-2020-26129 json
In JetBrains Ktor before 1.4.1, HTTP request smuggling was possible.
published 2020-11-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18759
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
In JetBrains Ktor before 1.4.1, HTTP request smuggling was possible.
Patch / fix
- jetbrains ktor 1.4.1
Exploit prediction
0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-444 Inconsistent Interpretation of HTTP Requests
References
-
blog.jetbrains.com
vendor-advisory
-
blog.jetbrains.com
/2020/11/16/jetbrains-security-bulletin-q3-2020/
vendor-advisory
Sources
- CVE List CVE-2020-26129
- NVD CVE-2020-26129
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