AUGUST 4, 2026
Live Feed
Return to register
Case File

CVE-2016-6816

HIGH · CVSS 7.1 EPSS 39.63% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2017-03-20 · Last synced 2026-08-04

Field Assessment

AI analysis pending.

Exhibit — Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit
External Security References

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2016-6816
Severity
HIGH
CVSS
7.1
EPSS
39.63%
Apache

Original Filing — NVD Description

The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other then their own.