CVE-2026-43670
WebKit: Processing maliciously crafted web content may bypass Content Security Policy
CVE-2026-43670 is fixed in 6 products on 2 platforms, first by Tahoe 26.5, released May 11, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
8.8
HIGH
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0023
13th percentile
A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. WebKit Bugzilla: 309004
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| macOS | |||
| Tahoe | 26.5 | Tahoe 26.5 | May 11, 2026 |
| Linux | |||
| webkit2gtk · Debian 13.5 (trixie) | 2.54.0-1~deb13u1 | DEBIAN-CVE-2026-43670 | Aug 25, 2026 |
| webkit2gtk3 · opensuse-leap 16.0 | 2.54.1-160000.1.1 | OPENSUSE-SU-2026:22076-1 | Nov 7, 2026 |
| webkit2gtk3 · sles 15.6 | 2.54.1-150600.12.81.3 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk3 · sles 15.7 | 2.54.1-150600.12.81.3 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk3 · sles 16.0 | 2.54.1-160000.1.1 | SUSE-SU-2026:24225-1 | Nov 7, 2026 |
| webkit2gtk3-soup2 · opensuse-leap 16.0 | 2.54.1-160000.1.1 | OPENSUSE-SU-2026:22076-1 | Nov 7, 2026 |
| webkit2gtk3-soup2 · sles 15.6 | 2.54.1-150600.12.81.4 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk3-soup2 · sles 15.7 | 2.54.1-150600.12.81.4 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk4 · opensuse-leap 16.0 | 2.54.1-160000.1.1 | OPENSUSE-SU-2026:22076-1 | Nov 7, 2026 |
| webkit2gtk4 · sles 15.6 | 2.54.1-150600.12.81.4 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk4 · sles 15.7 | 2.54.1-150600.12.81.4 | SUSE-SU-2026:4858-1 | Nov 7, 2026 |
| webkit2gtk4 · sles 16.0 | 2.54.1-160000.1.1 | SUSE-SU-2026:24225-1 | Nov 7, 2026 |
| wpewebkit · Debian 14 | 2.54.0-1 | DEBIAN-CVE-2026-43670 | Aug 25, 2026 |
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