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Fencer Vulns
high 8.8

CVE-2026-43670 json

A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts.

published 2026-08-25 2 mo ago modified 2026-08-27 2 mo ago also EUVD-2026-65739

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5. Processing maliciously crafted web content may bypass Content Security Policy.

Patch / fix

  • Apple Safari 26.5
  • Apple iOS and iPadOS 18.7.9, 26.5
  • Apple macOS 26.5
  • wpewebkit Debian 14 2.54.0-1
  • webkit2gtk Debian 13 2.54.0-1~deb13u1

debian advisories DEBIAN-CVE-2026-43670

  • webkit2gtk3 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 2.54.1-150600.12.81.3
  • webkit2gtk4 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 2.54.1-150600.12.81.4
  • webkit2gtk3-soup2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 2.54.1-150600.12.81.4
  • webkit2gtk3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.54.1-150400.4.152.2
  • webkit2gtk4 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.54.1-150400.4.152.2
  • webkit2gtk3-soup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.54.1-150400.4.152.2
  • webkit2gtk3 SLES for SAP applications 16.0, SLES 16.0 2.54.1-160000.1.1
  • webkit2gtk4 SLES for SAP applications 16.0, SLES 16.0 2.54.1-160000.1.1

suse advisories SUSE-SU-2026:4858-1SUSE-SU-2026:4676-1SUSE-SU-2026:24225-1

  • webkit2gtk3 openSUSE Leap 16.0 2.54.1-160000.1.1
  • webkit2gtk4 openSUSE Leap 16.0 2.54.1-160000.1.1
  • webkit2gtk3-soup2 openSUSE Leap 16.0 2.54.1-160000.1.1

opensuse advisories openSUSE-SU-2026:22076-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Apple Safari
  • Apple iOS and iPadOS
  • Apple macOS

Classification

Weakness
  • CWE-693 Protection Mechanism Failure

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.