CVE-2016-8743
httpd: Apache HTTP Request Parsing Whitespace Defects
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · December 20, 2016
Updated · September 21, 2026
Description
It was discovered that the HTTP parser in httpd incorrectly allowed certain characters not permitted by the HTTP protocol specification to appear unencoded in HTTP request headers. If httpd was used in conjunction with a proxy or backend server that interpreted those characters differently, a remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS 2.0 · 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N
CWE-20 · Improper Input Validation