High severity7.5NVD Advisory· Published Sep 25, 2018· Updated Jun 17, 2026
CVE-2018-14647
CVE-2018-14647
Description
Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
121- Range: 3.7.0, 3.6.0-3.6.6, 3.5.0-3.5.6, 3.4.0-3.4.9, 2.7.0-2.7.15
- osv-coords119 versionspkg:rpm/opensuse/python36&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python3-base&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/python3&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/python&distro=openSUSE%20Tumbleweedpkg:rpm/suse/python3-base&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/python3-base&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python3-base&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/python3&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/python3&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python3&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/python-base&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%202%2015%20SP1pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP3pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP3pkg:rpm/suse/python-base&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP4pkg:rpm/suse/python-base&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%202%2015%20SP1pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/python&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-doc&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python-doc&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/python-doc&distro=SUSE%20OpenStack%20Cloud%207
< 3.6.15-1.1+ 118 more
- (no CPE)range: < 3.6.15-1.1
- (no CPE)range: < 3.6.10-lp151.6.7.1
- (no CPE)range: < 3.6.10-lp151.6.7.1
- (no CPE)range: < 2.7.18-8.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.6.10-3.42.2
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 3.4.6-25.29.1
- (no CPE)range: < 3.4.10-25.52.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.17-7.32.1
- (no CPE)range: < 2.7.17-7.32.1
- (no CPE)range: < 2.7.17-7.32.1
- (no CPE)range: < 2.6.9-40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6.9-40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6.9-40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.17-7.32.2
- (no CPE)range: < 2.7.17-7.32.2
- (no CPE)range: < 2.7.17-7.32.2
- (no CPE)range: < 2.7.17-7.32.2
- (no CPE)range: < 2.7.17-7.32.2
- (no CPE)range: < 2.6.9-40.21.2
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6.9-40.21.2
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6.9-40.21.2
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6-8.40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6-8.40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.7.13-28.21.1
- (no CPE)range: < 2.6-8.40.21.1
- (no CPE)range: < 2.7.13-28.21.1
- The Python Project/Pythonv5Range: 3.8, 3.7, 3.6, 3.5, 3.4, 2.7
Patches
Vulnerability mechanics
References
16- bugs.python.org/issue34623nvdIssue TrackingPatchVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlnvdMailing ListThird Party Advisory
- www.securityfocus.com/bid/105396nvdThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1041740nvdThird Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2019:1260nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2019:2030nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2019:3725nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/06/msg00022.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/06/msg00023.htmlnvdMailing ListThird Party Advisory
- usn.ubuntu.com/3817-1/nvdThird Party Advisory
- usn.ubuntu.com/3817-2/nvdThird Party Advisory
- www.debian.org/security/2018/dsa-4306nvdThird Party Advisory
- www.debian.org/security/2018/dsa-4307nvdThird Party Advisory
- lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3Envd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/nvd
News mentions
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