CVE-2016-5699

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

9.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 95.2% of scored records. A rank, not a probability.

NVD base score

6.1 (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:N

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.

Published

2016-09-02 14:00Z10 YR AGO

Last updated

2024-08-06 01:07Z2 YR AGO

Reserved

2016-06-16

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')Variant
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

13322c3f99c5c4fae340ac6c3bbb096a757f3097f313206ad7b027740938f049

• www.splunk.comhttp://www.splunk.com/view/SP-CAAAPUEx_refsource_CONFIRM
• hg.python.orghttps://hg.python.org/cpython/rev/1c45047c5102x_refsource_CONFIRM
• rhn.redhat.comRHSA-2016:1630http://rhn.redhat.com/errata/RHSA-2016-1630.htmlvendor-advisoryx_refsource_REDHAT
• rhn.redhat.comRHSA-2016:1627http://rhn.redhat.com/errata/RHSA-2016-1627.htmlvendor-advisoryx_refsource_REDHAT
• hg.python.orghttps://hg.python.org/cpython/rev/bf3e1c9b80e9x_refsource_CONFIRM
• rhn.redhat.comRHSA-2016:1629http://rhn.redhat.com/errata/RHSA-2016-1629.htmlvendor-advisoryx_refsource_REDHAT
• www.splunk.comhttp://www.splunk.com/view/SP-CAAAPSVx_refsource_CONFIRM
• www.openwall.com[oss-security] 20160616 Re: CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.clienthttp://www.openwall.com/lists/oss-security/2016/06/16/2mailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20190207 [SECURITY] [DLA 1663-1] python3.4 security updatehttps://lists.debian.org/debian-lts-announce/2019/02/msg00011.htmlmailing-listx_refsource_MLIST
• www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.htmlx_refsource_CONFIRM
• hg.python.orghttps://hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWSx_refsource_CONFIRM
• docs.python.orghttps://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4x_refsource_CONFIRM
• www.openwall.com[oss-security] 20160615 Re: CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.clienthttp://www.openwall.com/lists/oss-security/2016/06/15/12mailing-listx_refsource_MLIST
• blog.blindspotsecurity.comhttp://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.htmlx_refsource_MISC
• www.openwall.com[oss-security] 20160614 CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.clienthttp://www.openwall.com/lists/oss-security/2016/06/14/7mailing-listx_refsource_MLIST
• www.securityfocus.com91226http://www.securityfocus.com/bid/91226vdb-entryx_refsource_BID
• rhn.redhat.comRHSA-2016:1628http://rhn.redhat.com/errata/RHSA-2016-1628.htmlvendor-advisoryx_refsource_REDHAT
• rhn.redhat.comRHSA-2016:1626http://rhn.redhat.com/errata/RHSA-2016-1626.htmlvendor-advisoryx_refsource_REDHAT
• lists.opensuse.orgopenSUSE-SU-2020:0086http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlvendor-advisoryx_refsource_SUSE