medium 6.2

CVE-2025-43240 json

A logic issue was addressed with improved checks.

published 2025-07-29 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23066

cvss: 6.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

A logic issue was addressed with improved checks. This issue is fixed in Safari 18.6, macOS Sequoia 15.6. A download's origin may be incorrectly associated.

Patch / fix

fixed in 2 distros 6

Apple Safari 18.6
Apple macOS 15.6

debian ubuntu red hat suse almalinux rocky linux

wpewebkit Debian 14 2.48.5-1
webkit2gtk Debian 12 2.48.5-1~deb12u1
webkit2gtk Debian 13 2.48.5-1~deb13u1
webkit2gtk Debian 14 2.48.5-1

debian advisories DEBIAN-CVE-2025-43240

webkit2gtk Ubuntu 22.04 LTS 2.48.5-0ubuntu0.22.04.1
webkit2gtk Ubuntu 24.04 LTS 2.48.5-0ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2025-43240

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 9 2.48.5-1.el9_6
webkit2gtk3-jsc RHEL 9 2.48.5-1.el9_6
webkit2gtk3 RHEL 8 2.48.5-1.el8_10
webkit2gtk3-jsc RHEL 8 2.48.5-1.el8_10
webkitgtk4 RHEL 7 ELS 2.48.5-1.el7_9
webkitgtk4-jsc RHEL 7 ELS 2.48.5-1.el7_9
webkit2gtk3 RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 2.48.5-1.el8_4
webkit2gtk3-jsc RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 2.48.5-1.el8_4

red hat advisories RHSA-2025:15729 RHSA-2025:14486 RHSA-2025:14434 RHSA-2025:14432 RHSA-2025:14433 RHSA-2025:14423

webkit2gtk3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.48.5-150400.4.122.1
webkit2gtk4 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.48.5-150400.4.122.1
webkit2gtk3-soup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 2.48.5-150400.4.122.1
webkit2gtk3 SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 2.48.5-150200.150.1
webkit2gtk3 SLE Module for Desktop Applications 15 SP7, SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 2.48.5-150600.12.43.1
webkit2gtk4 SLE Module for Development Tools 15 SP7, SLE Module for Development Tools 15 SP6, SLE Module for Basesystem 15 SP7 +2 more 2.48.5-150600.12.43.1
webkit2gtk3-soup2 SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.48.5-150600.12.43.1
webkit2gtk3 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.48.5-4.41.1

suse advisories SUSE-SU-2025:02973-1 SUSE-SU-2025:02777-1 SUSE-SU-2025:02766-1 SUSE-SU-2025:02765-1

webkit2gtk3 AlmaLinux 8 2.48.5-1.el8_10
webkit2gtk3-jsc AlmaLinux 8 2.48.5-1.el8_10
webkit2gtk3 AlmaLinux 9 2.48.5-1.el9_6
webkit2gtk3-jsc AlmaLinux 9 2.48.5-1.el9_6

almalinux advisories ALSA-2025:13780 ALSA-2025:13782

webkit2gtk3 Rocky Linux 9 2.48.5-1.el9_6
webkit2gtk3 Rocky Linux 8 2.48.5-1.el8_10

rocky linux advisories RLSA-2025:13782 RLSA-2025:13780

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-2025-43240 updated 2026-11-07 cvss 6.5

webkitgtk: A download’s origin may be incorrectly associated

Red Hat Enterprise Linux 6 webkitgtk
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.48.5-1.el8_10, webkit2gtk3-jsc 2.48.5-1.el8_10
fixed: vendor fix RHSA-2025:13780
Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.48.5-1.el9_6, webkit2gtk3-jsc 2.48.5-1.el9_6
fixed: vendor fix RHSA-2025:13782
Red Hat Enterprise Linux AppStream AUS (v. 8.2) webkit2gtk3 2.48.5-1.el8_2, webkit2gtk3-jsc 2.48.5-1.el8_2
fixed: vendor fix RHSA-2025:14432
Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3 2.48.5-1.el8_4, webkit2gtk3-jsc 2.48.5-1.el8_4
fixed: vendor fix RHSA-2025:14486
Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3 2.48.5-1.el8_6, webkit2gtk3-jsc 2.48.5-1.el8_6 Red Hat Enterprise Linux AppStream E4S (v.8.6) webkit2gtk3 2.48.5-1.el8_6, webkit2gtk3-jsc 2.48.5-1.el8_6
fixed: vendor fix RHSA-2025:14433
Red Hat Enterprise Linux AppStream E4S (v.8.8) webkit2gtk3 2.48.5-1.el8_8, webkit2gtk3-jsc 2.48.5-1.el8_8
fixed: vendor fix RHSA-2025:14434
Red Hat Enterprise Linux AppStream E4S (v.9.0) webkit2gtk3 2.48.5-1.el9_0, webkit2gtk3-jsc 2.48.5-1.el9_0
fixed: vendor fix RHSA-2025:14422

show 7 more

Red Hat Enterprise Linux AppStream E4S (v.9.2) webkit2gtk3 2.48.5-1.el9_2, webkit2gtk3-jsc 2.48.5-1.el9_2
fixed: vendor fix RHSA-2025:14421
Red Hat Enterprise Linux AppStream EUS (v.9.4) webkit2gtk3 2.48.5-1.el9_4, webkit2gtk3-jsc 2.48.5-1.el9_4
fixed: vendor fix RHSA-2025:14423
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) webkit2gtk3 2.48.5-1.el8_4, webkit2gtk3-jsc 2.48.5-1.el8_4
fixed: vendor fix RHSA-2025:14486
Red Hat Enterprise Linux AppStream TUS (v.8.6) webkit2gtk3 2.48.5-1.el8_6, webkit2gtk3-jsc 2.48.5-1.el8_6
fixed: vendor fix RHSA-2025:14433
Red Hat Enterprise Linux AppStream TUS (v.8.8) webkit2gtk3 2.48.5-1.el8_8, webkit2gtk3-jsc 2.48.5-1.el8_8
fixed: vendor fix RHSA-2025:14434
Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4 2.48.5-1.el7_9, webkitgtk4-jsc 2.48.5-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-doc 2.48.5-1.el7_9, webkitgtk4-devel 2.48.5-1.el7_9, webkitgtk4-debuginfo 2.48.5-1.el7_9, webkitgtk4-jsc-devel 2.48.5-1.el7_9
fixed: vendor fix RHSA-2025:15729
Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
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

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 15 mo ago (2025-07-30)

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Apple Safari
Apple macOS

Classification

Weakness

CWE-703 Improper Check or Handling of Exceptional Conditions

References

support.apple.com /en-us/124149
release-notes, vendor-advisory
support.apple.com /en-us/124152
release-notes, vendor-advisory
lists.debian.org /debian-lts-announce/2025/08/msg00015.html
seclists.org /fulldisclosure/2025/Aug/0
seclists.org /fulldisclosure/2025/Jul/32
openwall.com /lists/oss-security/2025/08/02/1

Sources

CVE List CVE-2025-43240
NVD CVE-2025-43240

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.

Summary