VULNERABILITY INTELLIGENCE
CVE-2020-1935
CVSS score4.8 MEDIUM
EPSS probability9.39%
CISA KEVNot currently listed
Published2020-02-24
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Description
In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Weakness classification
- nvd@nist.gov: CWE-444
Primary references
- security@apache.org — Broken Link, Mailing List, Third Party Advisory
- security@apache.org — Mailing List, Vendor Advisory
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org — Mailing List, Third Party Advisory
- security@apache.org — Mailing List, Third Party Advisory