01 Record

CVE-2016-6816

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

UnratedPUBLISHEDCNA: apache

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

39.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.5% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2017-03-20 18:00Z9 YR AGO

Last updated

2024-11-14 20:05Z1 YR AGO

Reserved

2016-08-12

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-20Improper Input ValidationClass
CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base

Data version

5.1

Document digest

d448ba4c288127d95f8727a13495f104f5b1ada6bcf8c07d9915bc917b275833

05 Affected products

VendorProductVersionsPlatforms

Apache Software FoundationApache Tomcat9.0.0.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, 6.0.0 to 6.0.47, Earlier, unsupported versions may also be affected.—

06 References

rhn.redhat.comRHSA-2017:0250http://rhn.redhat.com/errata/RHSA-2017-0250.htmlvendor-advisoryx_refsource_REDHAT
www.exploit-db.com41783https://www.exploit-db.com/exploits/41783/exploitx_refsource_EXPLOIT-DB
tomcat.apache.orghttps://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.0.39x_refsource_CONFIRM
tomcat.apache.orghttps://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.0.M13x_refsource_CONFIRM
www.securityfocus.com94461http://www.securityfocus.com/bid/94461vdb-entryx_refsource_BID
www.debian.orgDSA-3738http://www.debian.org/security/2016/dsa-3738vendor-advisoryx_refsource_DEBIAN
tomcat.apache.orghttps://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.73x_refsource_CONFIRM
rhn.redhat.comRHSA-2017:0244http://rhn.redhat.com/errata/RHSA-2017-0244.htmlvendor-advisoryx_refsource_REDHAT
www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlx_refsource_CONFIRM
access.redhat.comRHSA-2017:0935https://access.redhat.com/errata/RHSA-2017:0935vendor-advisoryx_refsource_REDHAT
security.netapp.comhttps://security.netapp.com/advisory/ntap-20180607-0001/x_refsource_CONFIRM
rhn.redhat.comRHSA-2017:0457http://rhn.redhat.com/errata/RHSA-2017-0457.htmlvendor-advisoryx_refsource_REDHAT
rhn.redhat.comRHSA-2017:0246http://rhn.redhat.com/errata/RHSA-2017-0246.htmlvendor-advisoryx_refsource_REDHAT
www.securitytracker.com1037332http://www.securitytracker.com/id/1037332vdb-entryx_refsource_SECTRACK
tomcat.apache.orghttps://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.8x_refsource_CONFIRM
tomcat.apache.orghttps://tomcat.apache.org/security-6.html#Fixed_in_Apache_Tomcat_6.0.48x_refsource_CONFIRM
access.redhat.comRHSA-2017:0455https://access.redhat.com/errata/RHSA-2017:0455vendor-advisoryx_refsource_REDHAT
rhn.redhat.comRHSA-2017:0527http://rhn.redhat.com/errata/RHSA-2017-0527.htmlvendor-advisoryx_refsource_REDHAT
rhn.redhat.comRHSA-2017:0245http://rhn.redhat.com/errata/RHSA-2017-0245.htmlvendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2017:0456https://access.redhat.com/errata/RHSA-2017:0456vendor-advisoryx_refsource_REDHAT
rhn.redhat.comRHSA-2017:0247http://rhn.redhat.com/errata/RHSA-2017-0247.htmlvendor-advisoryx_refsource_REDHAT
lists.apache.org[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190319 svn commit: r1855831 [23/30] - in /tomcat/site/trunk: ./ docs/ xdocs/https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190325 svn commit: r1856174 [22/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190325 svn commit: r1856174 [21/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190413 svn commit: r1857494 [16/20] - in /tomcat/site/trunk: ./ docs/ xdocs/https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190413 svn commit: r1857494 [15/20] - in /tomcat/site/trunk: ./ docs/ xdocs/https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190415 svn commit: r1857582 [17/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20190415 svn commit: r1857582 [16/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20200203 svn commit: r1873527 [23/30] - /tomcat/site/trunk/docs/https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20200213 svn commit: r1873980 [27/34] - /tomcat/site/trunk/docs/https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[tomcat-dev] 20200213 svn commit: r1873980 [26/34] - /tomcat/site/trunk/docs/https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
usn.ubuntu.comUSN-4557-1https://usn.ubuntu.com/4557-1/vendor-advisoryx_refsource_UBUNTU

01 Record index

CVE-2016-6816

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2016-6816

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References