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Fencer Vulns
high 7.5

CVE-2019-18197 json

Nokogiri affected by libxslt Use of Uninitialized Resource/Use After Free vulnerability

published 2019-10-18 7 y ago modified 2026-07-18 3 mo ago also EUVD-2022-1901 , GHSA-242x-7cm6-4w8j , JLSEC-2026-580

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.

Patch / fix

  • rubygems nokogiri 1.10.5
  • julia XSLT_jll 1.1.34+0
  • libxslt Debian 14, Debian 13, Debian 12 1.1.32-2.2

debian advisories DEBIAN-CVE-2019-18197

  • libxslt Ubuntu 16.04 LTS 1.1.28-2.1ubuntu0.3
  • libxslt Ubuntu 18.04 LTS 1.1.29-5ubuntu0.2
  • libxslt Ubuntu Pro 14.04 LTS 1.1.28-2ubuntu0.2+esm1

ubuntu advisories UBUNTU-CVE-2019-18197

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxslt RHEL 8 1.1.32-5.el8
  • libxslt RHEL 7 1.1.28-6.el7
  • libxslt-python RHEL 7 1.1.28-6.el7
  • chromium-browser RHEL 6 EXTRAS 80.0.3987.87-1.el6_10

red hat advisories RHSA-2020:4464RHSA-2020:4005RHSA-2020:0514

  • libxslt SLES 12 SP5, SLES 12 SP4, SLES 12 SP3-BCL +14 more 1.1.28-17.9.1
  • libxslt SLE Module for Basesystem 15 SP1 1.1.32-3.8.24

suse advisories SUSE-SU-2020:0920-2SUSE-SU-2020:1409-1SUSE-SU-2020:0920-1

  • chromium openSUSE Tumbleweed 93.0.4577.82-1.1
  • libxslt openSUSE Tumbleweed 1.1.34-3.2
  • chromium openSUSE Tumbleweed 113.0.5672.92-1.1
  • libxslt openSUSE Leap 15.1 1.1.32-lp151.3.6.1
  • libxslt-python openSUSE Leap 15.1 1.1.32-lp151.3.6.1
  • re2 Package Hub 12 SP3, Package Hub 12 20200101-25.1
  • chromium Package Hub 12 SP3, Package Hub 12 80.0.3987.87-31.1
  • chromium Package Hub 15 SP1 80.0.3987.87-bp151.3.59.1

opensuse advisories openSUSE-SU-2024:10681-1openSUSE-SU-2024:11017-1openSUSE-SU-2024:12948-1openSUSE-SU-2020:0731-1openSUSE-SU-2020:0233-1openSUSE-SU-2020:0210-1

  • libxslt Alpine 3.10, Alpine 3.9, Alpine 3.8 1.1.33-r2
  • libxslt Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 1.1.33-r3
  • libxslt Alpine 3.7 1.1.31-r2

alpine advisories ALPINE-CVE-2019-18197

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • chromium Arch Linux 80.0.3987.87-1

arch linux advisories AVG-1092

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-18197 updated cvss 7.5

libxslt: use after free in xsltCopyText in transform.c could lead to information disclosure

  • Red Hat Enterprise Linux 5 libxslt Red Hat Enterprise Linux 6 libxslt, libxslt-python
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 10 (Newton) libxslt-python Red Hat OpenStack Platform 13 (Queens) libxslt-python Red Hat OpenStack Platform 14 (Rocky) libxslt-python
    affected: no fix planned “Will not fix”
  • Red Hat Storage 3 libxslt, libxslt-python
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) libxslt-devel 1.1.32-5.el8, libxslt-debuginfo 1.1.32-5.el8, libxslt-debugsource 1.1.32-5.el8 Red Hat Enterprise Linux BaseOS (v. 8) libxslt 1.1.32-5.el8
    fixed: vendor fix RHSA-2020:4464
  • Red Hat Enterprise Linux Client (v. 7) libxslt 1.1.28-6.el7 Red Hat Enterprise Linux Client Optional (v. 7) libxslt-python 1.1.28-6.el7 Red Hat Enterprise Linux ComputeNode (v. 7) libxslt 1.1.28-6.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libxslt-python 1.1.28-6.el7
    fixed: vendor fix RHSA-2020:4005
  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10 Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10
    fixed: vendor fix RHSA-2020:0514
  • Red Hat Enterprise Linux Server (v. 7) libxslt 1.1.28-6.el7 Red Hat Enterprise Linux Server Optional (v. 7) libxslt-python 1.1.28-6.el7
    fixed: vendor fix RHSA-2020:4005
  • Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10
    fixed: vendor fix RHSA-2020:0514
show 2 more
  • Red Hat Enterprise Linux Workstation (v. 7) libxslt 1.1.28-6.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libxslt-python 1.1.28-6.el7
    fixed: vendor fix RHSA-2020:4005
  • Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10
    fixed: vendor fix RHSA-2020:0514

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

4.45% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
rubygems nokogiri
<1.10.5
1.10.5
julia XSLT_jll
<1.1.34+0
1.1.34+0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.