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CVE-2016-8743

Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response…

High7.5EPSS 13.3%
Published
Updated
Reserved
Assigned by
apache

Description

Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response lines and headers. Accepting these different behaviors represented a security concern when httpd participates in any chain of proxies or interacts with back-end application servers, either through mod_proxy or using conventional CGI mechanisms, and may result in request smuggling, response splitting and cache pollution.

Scores

CVSS scores of CVE-2016-8743, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS (exploitation in 30 days)
13.3% · top 3.6% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

  • Request Smuggling, Response Splitting

Affected products

  • Apache Software Foundation · Apache HTTP Server

    • affected 2.2.0 to 2.2.31, 2.4.1 to 2.4.23

References (40)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .