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CVE-2016-5699
CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x…
Medium6.1EPSS 9.9%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 9.9% · top 4.4% 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: Medium 6.1.
Weakness
Affected products
n/a
- affected n/a
References (19)
- http://www.splunk.com/view/SP-CAAAPUE (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://hg.python.org/cpython/rev/1c45047c5102 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2016:1630 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2016:1627 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://hg.python.org/cpython/rev/bf3e1c9b80e9 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2016:1629 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.splunk.com/view/SP-CAAAPSV (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20160616 Re: CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.client (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20190207 [SECURITY] [DLA 1663-1] python3.4 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWS (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20160615 Re: CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.client (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html (opens in a new tab)x_refsource_MISCx_transferred
- [oss-security] 20160614 CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.client (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 91226 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2016:1628 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2016:1626 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- openSUSE-SU-2020:0086 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .