CVE-2026-20643

high

Published 2026-05-19 · Modified 2026-04-27

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Apple Security HT · View original ↗ · proprietary-no-redistribution

Full prose not cached — VIR stores only structured fields (affected/fixed versions, references) for this source. Click "View original" above for the vendor's full advisory.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`2.52.3-2~deb13u1`
sid	Fixed	`2.52.1-1`
forky	Fixed	`2.52.1-1`
bullseye	Affected	—
bookworm	Affected	—

apple Fixed 1 release

Version	Status	Fixed in
26.4	Fixed	—

ios Fixed 2 releases

Version	Status	Fixed in
26.4	Fixed	—
18.7.7	Fixed	—

macOS Fixed 2 releases

Version	Status	Fixed in
26.4	Fixed	—
—	Fixed	—

Red Hat Fixed 2 releases

Version	Status	Fixed in
9	Fixed	—
8	Fixed	—

Rocky Linux Fixed 1 release

Version	Status	Fixed in
9	Fixed	—

safari Fixed 1 release

Version	Status	Fixed in
26.4	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.