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Fencer Vulns
critical 9.8

CVE-2020-10018 json

WebKitGTK through 2.26.4 and WPE WebKit through 2.26.4 (which are the versions right before 2.28.0) contains a memory corruption issue (use…

published 2020-03-02 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2483

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

WebKitGTK through 2.26.4 and WPE WebKit through 2.26.4 (which are the versions right before 2.28.0) contains a memory corruption issue (use-after-free) that may lead to arbitrary code execution. This issue has been fixed in 2.28.0 with improved memory handling.

Patch / fix

  • webkitgtk webkitgtk 2.28.0
  • wpewebkit wpe_webkit 2.28.0
  • wpewebkit Debian 14, Debian 13, Debian 12 2.28.0-1
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.28.0-2

debian advisories DEBIAN-CVE-2020-10018

  • webkit2gtk Ubuntu 18.04 LTS 2.28.0-0ubuntu0.18.04.3
  • webkit2gtk Ubuntu 20.04 LTS 2.28.0-1ubuntu2

ubuntu advisories UBUNTU-CVE-2020-10018

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

  • LibRaw RHEL 8 0.19.5-2.el8
  • webkit2gtk3 RHEL 8 2.28.4-1.el8
  • webkit2gtk3-jsc RHEL 8 2.28.4-1.el8
  • gnome-settings-daemon RHEL 8 3.32.0-11.el8
  • webkitgtk4 RHEL 7 2.28.2-2.el7
  • webkitgtk4-jsc RHEL 7 2.28.2-2.el7

red hat advisories RHSA-2020:4451RHSA-2020:4035

  • webkit2gtk3 SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +7 more 2.34.3-3.92.1
  • webkit2gtk3 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 2.34.3-2.82.1
  • webkit2gtk3 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +15 more 2.28.1-2.50.3
  • webkit2gtk3 SLES for SAP 15, SLES 15-LTSS, SLE Module for Desktop Applications 15 SP1 +3 more 2.28.1-3.49.2

suse advisories SUSE-SU-2022:0183-1SUSE-SU-2022:0142-1SUSE-SU-2020:1135-1SUSE-SU-2020:1109-1

  • gtk3 openSUSE Tumbleweed 2.32.4-1.1
  • webkit2gtk3 openSUSE Leap 15.1 2.28.1-lp151.2.15.2

opensuse advisories openSUSE-SU-2024:11506-1openSUSE-SU-2020:0602-1

  • gvfs AlmaLinux 8 1.36.2-10.el8
  • vte291 AlmaLinux 8 0.52.4-2.el8
  • libsoup AlmaLinux 8 2.62.3-2.el8
  • potrace AlmaLinux 8 1.15-3.el8
  • tracker AlmaLinux 8 2.1.5-2.el8
  • nautilus AlmaLinux 8 3.28.1-14.el8
  • pipewire AlmaLinux 8 0.3.6-1.el8
  • PackageKit AlmaLinux 8 1.1.12-6.el8

almalinux advisories ALSA-2020:4451

  • gtk3 Rocky Linux 8 3.22.30-6.el8
  • LibRaw Rocky Linux 8 0.19.5-2.el8
  • vte291 Rocky Linux 8 0.52.4-2.el8
  • libsoup Rocky Linux 8 2.62.3-2.el8
  • potrace Rocky Linux 8 1.15-3.el8
  • tracker Rocky Linux 8 2.1.5-2.el8
  • pipewire Rocky Linux 8 0.3.6-1.el8
  • PackageKit Rocky Linux 8 1.1.12-6.el8

rocky linux advisories RLSA-2020:4451

  • webkit2gtk Alpine 3.20, Alpine 3.19, Alpine 3.18 +7 more 2.28.0-r0

alpine advisories ALPINE-CVE-2020-10018

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

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-2020-10018 updated cvss 7.5

webkitgtk: Use-after-free issue in accessibility/AXObjectCache.cpp

  • Red Hat Enterprise Linux 6 webkitgtk
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.28.4-1.el8, webkit2gtk3-jsc 2.28.4-1.el8
    fixed: vendor fix RHSA-2020:4451
  • Red Hat Enterprise Linux Client (v. 7) webkitgtk4 2.28.2-2.el7, webkitgtk4-jsc 2.28.2-2.el7 Red Hat Enterprise Linux Client Optional (v. 7) webkitgtk4-doc 2.28.2-2.el7, webkitgtk4-devel 2.28.2-2.el7, webkitgtk4-debuginfo 2.28.2-2.el7, webkitgtk4-jsc-devel 2.28.2-2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) webkitgtk4 2.28.2-2.el7, webkitgtk4-jsc 2.28.2-2.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) webkitgtk4-doc 2.28.2-2.el7, webkitgtk4-devel 2.28.2-2.el7, webkitgtk4-debuginfo 2.28.2-2.el7, webkitgtk4-jsc-devel 2.28.2-2.el7 Red Hat Enterprise Linux Server (v. 7) webkitgtk4 2.28.2-2.el7, webkitgtk4-jsc 2.28.2-2.el7 Red Hat Enterprise Linux Server Optional (v. 7) webkitgtk4-doc 2.28.2-2.el7, webkitgtk4-devel 2.28.2-2.el7, webkitgtk4-debuginfo 2.28.2-2.el7, webkitgtk4-jsc-devel 2.28.2-2.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) webkitgtk4 2.28.2-2.el7, webkitgtk4-jsc 2.28.2-2.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) webkitgtk4-doc 2.28.2-2.el7
    fixed: vendor fix RHSA-2020:4035
  • Red Hat CodeReady Linux Builder (v. 8) gvfs 1.36.2-10.el8, nautilus 3.28.1-14.el8, frei0r-plugins 1.6.1-7.el8 Red Hat Enterprise Linux AppStream (v. 8) gdm 3.28.3-34.el8, gtk3 3.22.30-6.el8, gvfs 1.36.2-10.el8, potrace 1.15-3.el8, LibRaw 0.19.5-2.el8, tracker 2.1.5-2.el8, +72 more Red Hat Enterprise Linux BaseOS (v. 8) libsoup 2.62.3-2.el8, pygobject3 3.28.3-2.el8, python3-gobject-base 3.28.3-2.el8, gsettings-desktop-schemas 3.32.0-5.el8
    not affected: vulnerable code not present

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

Exploit prediction

4.99% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.