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Fencer Vulns
medium 6.5

CVE-2024-40866 json

The issue was addressed with improved UI.

published 2024-09-16 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-38699

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

The issue was addressed with improved UI. This issue is fixed in Safari 18, macOS Sequoia 15. Visiting a malicious website may lead to address bar spoofing.

Patch / fix

  • Apple Safari 18
  • Apple macOS 15
  • wpewebkit Debian 14, Debian 13 2.46.1-1
  • webkit2gtk Debian 12 2.46.0-2~deb12u1
  • webkit2gtk Debian 14, Debian 13 2.46.0-1

debian advisories DEBIAN-CVE-2024-40866

  • webkit2gtk Ubuntu 22.04 LTS 2.46.1-0ubuntu0.22.04.3
  • webkit2gtk Ubuntu 24.04 LTS 2.46.1-0ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2024-40866

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

  • webkit2gtk3 RHEL 8 2.46.3-1.el8_10
  • webkit2gtk3-jsc RHEL 8 2.46.3-1.el8_10
  • webkit2gtk3 RHEL 9 2.46.3-1.el9_5
  • webkit2gtk3-jsc RHEL 9 2.46.3-1.el9_5
  • webkit2gtk3 RHEL 9 2.46.1-2.el9_4
  • webkit2gtk3-jsc RHEL 9 2.46.1-2.el9_4
  • webkitgtk4 RHEL 7 ELS 2.48.3-2.el7_9
  • webkitgtk4-jsc RHEL 7 ELS 2.48.3-2.el7_9

red hat advisories RHSA-2025:10364RHSA-2024:9636RHSA-2024:9553RHSA-2024:8180

  • webkit2gtk3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.46.5-150400.4.103.1
  • webkit2gtk4 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.46.5-150400.4.103.1
  • webkit2gtk3-soup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 2.46.5-150400.4.103.1
  • webkit2gtk3 SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 2.46.5-150600.12.24.1
  • webkit2gtk4 SLE Module for Development Tools 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.46.5-150600.12.24.1
  • webkit2gtk3-soup2 SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.46.5-150600.12.24.1
  • webkit2gtk3 SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 2.46.3-150600.12.16.1
  • webkit2gtk4 SLE Module for Development Tools 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.46.3-150600.12.16.1

suse advisories SUSE-SU-2025:0104-1SUSE-SU-2025:0096-1SUSE-SU-2025:0043-1SUSE-SU-2024:4084-1SUSE-SU-2024:3870-1SUSE-SU-2024:3869-1

  • webkit2gtk3 AlmaLinux 8 2.46.3-1.el8_10
  • webkit2gtk3-jsc AlmaLinux 8 2.46.3-1.el8_10
  • webkit2gtk3 AlmaLinux 9 2.46.3-1.el9_5
  • webkit2gtk3-jsc AlmaLinux 9 2.46.3-1.el9_5
  • webkit2gtk3 AlmaLinux 9 2.46.1-2.el9_4
  • webkit2gtk3-jsc AlmaLinux 9 2.46.1-2.el9_4

almalinux advisories ALSA-2024:9636ALSA-2024:9553ALSA-2024:8180

  • webkit2gtk3 Rocky Linux 8 2.46.3-1.el8_10
  • webkit2gtk3 Rocky Linux 9 2.46.1-2.el9_4

rocky linux advisories RLSA-2024:9636RLSA-2024:8180

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-2024-40866 updated cvss 6.5

webkitgtk: Visiting a malicious website may lead to address bar spoofing

  • Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.46.3-1.el8_10, webkit2gtk3-jsc 2.46.3-1.el8_10
    fixed: vendor fix RHSA-2024:9636
  • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.46.1-2.el9_4, webkit2gtk3 2.46.3-1.el9_5, webkit2gtk3-jsc 2.46.1-2.el9_4, webkit2gtk3-jsc 2.46.3-1.el9_5
    fixed: vendor fix RHSA-2024:8180
  • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4 2.48.3-2.el7_9, webkitgtk4-jsc 2.48.3-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-doc 2.48.3-2.el7_9, webkitgtk4-devel 2.48.3-2.el7_9, webkitgtk4-debuginfo 2.48.3-2.el7_9, webkitgtk4-jsc-devel 2.48.3-2.el7_9
    fixed: vendor fix RHSA-2025:10364

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
partial
Assessed
2 y ago

Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected products

  • Apple Safari
  • Apple macOS

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.