Low severity3.7NVD Advisory· Published Jan 11, 2017· Updated Jun 17, 2026
CVE-2016-9015
CVE-2016-9015
Description
Versions 1.17 and 1.18 of the Python urllib3 library suffer from a vulnerability that can cause them, in certain configurations, to not correctly validate TLS certificates. This places users of the library with those configurations at risk of man-in-the-middle and information leakage attacks. This vulnerability affects users using versions 1.17 and 1.18 of the urllib3 library, who are using the optional PyOpenSSL support for TLS instead of the regular standard library TLS backend, and who are using OpenSSL 1.1.0 via PyOpenSSL. This is an extremely uncommon configuration, so the security impact of this vulnerability is low.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
urllib3PyPI | >= 1.17, < 1.18.1 | 1.18.1 |
Affected products
35cpe:2.3:a:python:urllib3:1.17:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:python:urllib3:1.17:*:*:*:*:*:*:*
- cpe:2.3:a:python:urllib3:1.18:*:*:*:*:*:*:*
- ghsa-coords33 versionspkg:pypi/urllib3pkg:rpm/opensuse/python3-urllib3&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-urllib3&distro=openSUSE%20Tumbleweedpkg:rpm/suse/python-cliff&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-mock&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-oauthlib&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/python-oauthlib&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-oauthlib&distro=SUSE%20Manager%20Server%203.2pkg:rpm/suse/python-oauthlib&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-oauthlib&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/python-oauthlib&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/python-pbr&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-PyJWT&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-PyJWT&distro=SUSE%20Manager%20Server%203.2pkg:rpm/suse/python-PyJWT&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-rsa&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python-rsa&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/python-rsa&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-rsa&distro=SUSE%20Manager%20Server%203.2pkg:rpm/suse/python-rsa&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Containers%2012pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python-setuptools&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/python-setuptools&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-stevedore&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-urllib3&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python-urllib3&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/python-urllib3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/python-urllib3&distro=SUSE%20Manager%20Server%203.1pkg:rpm/suse/python-urllib3&distro=SUSE%20Manager%20Server%203.2
>= 1.17, < 1.18.1+ 32 more
- (no CPE)range: >= 1.17, < 1.18.1
- (no CPE)range: < 1.18.1-1.2
- (no CPE)range: < 1.26.6-1.2
- (no CPE)range: < 1.14.0-11.3.2
- (no CPE)range: < 2.0.0-3.7.25
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 0.7.2-3.9.20
- (no CPE)range: < 3.1.1-3.5.2
- (no CPE)range: < 1.4.2-3.10.27
- (no CPE)range: < 1.4.2-3.10.27
- (no CPE)range: < 1.4.2-3.10.27
- (no CPE)range: < 3.1.4-12.9.17
- (no CPE)range: < 3.1.4-12.9.17
- (no CPE)range: < 3.1.4-12.9.17
- (no CPE)range: < 3.1.4-12.9.17
- (no CPE)range: < 3.1.4-12.9.17
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 40.6.2-4.12.23
- (no CPE)range: < 1.8.0-16.2.1
- (no CPE)range: < 1.22-3.10.1
- (no CPE)range: < 1.22-3.10.1
- (no CPE)range: < 1.22-3.10.1
- (no CPE)range: < 1.22-3.10.1
- (no CPE)range: < 1.22-3.10.1
Patches
Vulnerability mechanics
References
7- www.securityfocus.com/bid/93941nvdThird Party AdvisoryVDB Entry
- github.com/advisories/GHSA-v4w5-p2hg-8fh6ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2016-9015ghsaADVISORY
- www.openwall.com/lists/oss-security/2016/10/27/6nvdMailing ListMitigationWEB
- github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2017-98.yamlghsaWEB
- github.com/urllib3/urllib3/commit/c32cdbc16a9634fa0f8c829d1270301570158715ghsaWEB
- web.archive.org/web/20210123184150/http://www.securityfocus.com/bid/93941ghsaWEB
News mentions
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