Use after free in Apple Safari
Priority LOW 29CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 13 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Partial Safari (Apple): 26.5.2iOS and iPadOS (Apple): 18.7.10, 26.5.2+4 more productsRed Hat: 10 advisoriesRed Hat: 13 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 26.5.2 | 26.5.2 | Patch available | CNA |
| Apple | iOS and iPadOS | before 18.7.10; before 26.5.2 | 18.7.10, 26.5.2 | Patch available | CNA |
| Apple | macOS | before 26.5.2 | 26.5.2 | Patch available | CNA |
| Apple | tvOS | before 26.6 | 26.6 | Patch available | CNA |
| Apple | visionOS | before 26.6 | 26.6 | Patch available | CNA |
| Apple | watchOS | before 26.6 | 26.6 | Patch available | CNA |
- Safari VendorApple Affected before 26.5.2 Fixed in 26.5.2 Patch available CNA
- iOS and iPadOS VendorApple Affected before 18.7.10; before 26.5.2 Fixed in 18.7.10, 26.5.2 Patch available CNA
- macOS VendorApple Affected before 26.5.2 Fixed in 26.5.2 Patch available CNA
- tvOS VendorApple Affected before 26.6 Fixed in 26.6 Patch available CNA
- visionOS VendorApple Affected before 26.6 Fixed in 26.6 Patch available CNA
- watchOS VendorApple Affected before 26.6 Fixed in 26.6 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* | before 26.5.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 26.5.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 26.5.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | before 26.5.2 | Vulnerable | Apple |
- cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 26.5.2 Vulnerable ·Apple
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 26.5.2 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 26.5.2 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 26.5.2 Vulnerable ·Apple
Remediation
- Fix · CNA Safari (Apple) Fixed in 26.5.2
- Fix · CNA iOS and iPadOS (Apple) Fixed in 18.7.10, 26.5.2
- Fix · CNA macOS (Apple) Fixed in 26.5.2
- Fix · CNA tvOS (Apple) Fixed in 26.6
- Fix · CNA visionOS (Apple) Fixed in 26.6
- Fix · CNA watchOS (Apple) Fixed in 26.6
Red Hat 10 advisories
- RHSA-2026:74084 Released 2026-09-30 · Red Hat rating Criticalwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.54.0-1.el8_10, webkit2gtk3-devel-2.54.0-1.el8_10, webkit2gtk3-jsc-2.54.0-1.el8_10 +1
- RHSA-2026:59326 Released 2026-08-25 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) webkit2gtk3-2.52.5-1.el8_8, webkit2gtk3-devel-2.52.5-1.el8_8, webkit2gtk3-jsc-2.52.5-1.el8_8 +1
- Red Hat Enterprise Linux AppStream TUS (v.8.8) webkit2gtk3-2.52.5-1.el8_8, webkit2gtk3-devel-2.52.5-1.el8_8, webkit2gtk3-jsc-2.52.5-1.el8_8 +1
- RHSA-2026:59325 Released 2026-08-25 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3-2.52.5-1.el8_6, webkit2gtk3-devel-2.52.5-1.el8_6, webkit2gtk3-jsc-2.52.5-1.el8_6 +1
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) webkit2gtk3-2.52.5-1.el8_6, webkit2gtk3-devel-2.52.5-1.el8_6, webkit2gtk3-jsc-2.52.5-1.el8_6 +1
Show 7 more Red Hat advisories
- RHSA-2026:58564 Released 2026-08-24 · Red Hat rating Importantwebkitgtk4 security update
- Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.52.5-1.el7_9, webkitgtk4-devel-2.52.5-1.el7_9, webkitgtk4-jsc-2.52.5-1.el7_9 +1
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.52.5-1.el7_9, webkitgtk4-doc-2.52.5-1.el7_9, webkitgtk4-jsc-devel-2.52.5-1.el7_9
- RHSA-2026:58550 Released 2026-08-24 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) webkit2gtk3-2.52.5-1.el9_2, webkit2gtk3-devel-2.52.5-1.el9_2, webkit2gtk3-jsc-2.52.5-1.el9_2 +1
- RHSA-2026:57348 Released 2026-08-20 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3-2.52.5-1.el8_4, webkit2gtk3-devel-2.52.5-1.el8_4, webkit2gtk3-jsc-2.52.5-1.el8_4 +1
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) webkit2gtk3-2.52.5-1.el8_4, webkit2gtk3-devel-2.52.5-1.el8_4, webkit2gtk3-jsc-2.52.5-1.el8_4 +1
- RHSA-2026:54634 Released 2026-08-13 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream E4S (v.9.4) webkit2gtk3-2.52.5-1.el9_4, webkit2gtk3-devel-2.52.5-1.el9_4, webkit2gtk3-jsc-2.52.5-1.el9_4 +1
- RHSA-2026:54572 Released 2026-08-13 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) webkit2gtk3-2.52.5-1.el9_6, webkit2gtk3-devel-2.52.5-1.el9_6, webkit2gtk3-jsc-2.52.5-1.el9_6 +1
- RHSA-2026:42062 Released 2026-07-20 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.52.5-1.el9_8, webkit2gtk3-devel-2.52.5-1.el9_8, webkit2gtk3-jsc-2.52.5-1.el9_8 +1
- RHSA-2026:42088 Released 2026-07-20 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.52.5-1.el8_10, webkit2gtk3-devel-2.52.5-1.el8_10, webkit2gtk3-jsc-2.52.5-1.el8_10 +1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple watchOS 26.6
34 records Highest priority Priority MEDIUM 4 MEDIUM, 30 LOW
Other records, highest priority first
- TI-2026-28748 Improper input validation in Apple iOS and iPadOSPriority MEDIUM 46
- TI-2026-31807 Use after free in Apple SafariPriority MEDIUM 43
- TI-2026-31823 Use after free in Apple SafariPriority MEDIUM 40
- Release ·
Apple visionOS 26.6
32 records Highest priority Priority MEDIUM 4 MEDIUM, 28 LOW
Other records, highest priority first
- TI-2026-28748 Improper input validation in Apple iOS and iPadOSPriority MEDIUM 46
- TI-2026-31807 Use after free in Apple SafariPriority MEDIUM 43
- TI-2026-31823 Use after free in Apple SafariPriority MEDIUM 40
Show 3 more groups
- Release ·
Apple tvOS 26.6
32 records Highest priority Priority MEDIUM 4 MEDIUM, 28 LOW
Other records, highest priority first
- TI-2026-28748 Improper input validation in Apple iOS and iPadOSPriority MEDIUM 46
- TI-2026-31807 Use after free in Apple SafariPriority MEDIUM 43
- TI-2026-31823 Use after free in Apple SafariPriority MEDIUM 40
- Release ·
Apple Safari, macOS 26.5.2
31 records Highest priority Priority MEDIUM 3 MEDIUM, 28 LOW
Other records, highest priority first
- TI-2026-31807 Use after free in Apple SafariPriority MEDIUM 43
- TI-2026-31823 Use after free in Apple SafariPriority MEDIUM 40
- TI-2026-31797 Type confusion in Apple SafariPriority MEDIUM 40
- Release ·
Apple iOS and iPadOS 18.7.10, 26.5.2
23 records Highest priority Priority MEDIUM 3 MEDIUM, 20 LOW
Other records, highest priority first
- TI-2026-28748 Improper input validation in Apple iOS and iPadOSPriority MEDIUM 46
- TI-2026-31823 Use after free in Apple SafariPriority MEDIUM 40
- TI-2026-31797 Type confusion in Apple SafariPriority MEDIUM 40
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:42088, RHSA-2026:74084 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:42062 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2026:57348 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2026:59325 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2026:59326 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:58550 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:54634 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:54572 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:57348 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:59325 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2026:59326 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2026:58564 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2026:58564 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-43699
- 2026-10-03 Alias added: GHSA-v8m2-c626-7f74
References
More Apple Ipados vulnerabilities
- 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
Sources
- CVE-2026-43699 · CVE Program
- CVE-2026-43699 · NVD
- FIRST EPSS
- GHSA-v8m2-c626-7f74 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-43699 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences