CVE-2018-14647Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-335, CWE-665, CWE-909
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
python python python:python | from 2.7.0 through 2.7.15; from 3.4.0 through 3.4.9; from 3.5.0 through 3.5.6; from 3.6.0 through 3.6.6; 3.7.0 | NVD |
canonical ubuntu_linux canonical:ubuntu_linux | 12.04; 14.04; 16.04; 18.04 | NVD |
debian debian_linux debian:debian_linux | 8.0; 9.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 30 | NVD |
opensuse leap opensuse:leap | 15.1 | NVD |
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop | 7.0 | NVD |
redhat enterprise_linux_server redhat:enterprise_linux_server | 7.0 | NVD |
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation | 7.0 | NVD |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlmailing-list, third-party-advisory
- http://www.securityfocus.com/bid/105396third-party-advisory, vdb-entry
- http://www.securitytracker.com/id/1041740third-party-advisory, vdb-entry
- https://access.redhat.com/errata/RHSA-2019:1260third-party-advisory
- https://access.redhat.com/errata/RHSA-2019:2030third-party-advisory
- https://access.redhat.com/errata/RHSA-2019:3725third-party-advisory
- https://bugs.python.org/issue34623issue-tracking, patch, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647issue-tracking, third-party-advisory
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/06/msg00022.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00023.htmlmailing-list, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/
- https://usn.ubuntu.com/3817-1/third-party-advisory
- https://usn.ubuntu.com/3817-2/third-party-advisory
- https://www.debian.org/security/2018/dsa-4306third-party-advisory
- https://www.debian.org/security/2018/dsa-4307third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.