TI-2025-21766 Aliases CVE-2025-30466 GHSA-m66r-fg5x-99cr

Origin validation error in Apple Safari

MEDIUM 49CWE-346Published 2025-05-29 · Updated 2026-04-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-346.

Summary

This issue was addressed through improved state management. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, visionOS 2.4. A website may be able to bypass Same Origin Policy.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00316 24th percentileScored 2026-11-07

Fix Fixed Safari (Apple): 18.4iOS and iPadOS (Apple): 18.4+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apple	Safari	before 18.4	18.4	Patch available	CNA
Apple	iOS and iPadOS	before 18.4	18.4	Patch available	CNA
Apple	macOS	before 15.4	15.4	Patch available	CNA
Apple	visionOS	before 2.4	2.4	Patch available	CNA

Safari VendorApple Affected before 18.4 Fixed in 18.4 Patch available CNA
iOS and iPadOS VendorApple Affected before 18.4 Fixed in 18.4 Patch available CNA
macOS VendorApple Affected before 15.4 Fixed in 15.4 Patch available CNA
visionOS VendorApple Affected before 2.4 Fixed in 2.4 Patch available CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:a:apple:safari::::::::	before 18.4	Vulnerable	Apple
cpe:2.3:o:apple:ipados::::::::	before 18.4	Vulnerable	Apple
cpe:2.3:o:apple:iphone_os::::::::	before 18.4	Vulnerable	Apple
cpe:2.3:o:apple:macos::::::::	before 15.4	Vulnerable	Apple
cpe:2.3:o:apple:visionos::::::::	before 2.4	Vulnerable	Apple

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 18.4 Vulnerable ·Apple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 18.4 Vulnerable ·Apple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 18.4 Vulnerable ·Apple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 15.4 Vulnerable ·Apple
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions before 2.4 Vulnerable ·Apple

Remediation

Fix · CNA Safari (Apple) Fixed in 18.4
Fix · CNA iOS and iPadOS (Apple) Fixed in 18.4
Fix · CNA macOS (Apple) Fixed in 15.4
Fix · CNA visionOS (Apple) Fixed in 2.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-05-29
Apple macOS 15.4
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2025-22500 Memory corruption in Apple macOSPriority MEDIUM 45
- TI-2025-22469 Information disclosure in Apple macOSPriority LOW 24
Show all 3 records →
Release · 2025-05-29
Apple iOS and iPadOS, visionOS 18.4, 2.4
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2025-22439 Sensitive information in log files in Apple iOS and iPadOSPriority LOW 25
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2025-30466
2026-10-03 Alias added: GHSA-m66r-fg5x-99cr

References

Advisory 4

TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8

See all 2382 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences