Apple Multiple Products Use-After-Free WebKit Vulnerability
Apple — Safari
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.
8.8
8.9%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- Dec 17, 2025
- Modified
- Jun 17, 2026
- Added to KEV
- Dec 15, 2025
- Federal patch due
- Jan 5, 2026
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2025-43529, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- 0xjohnnydev/WebKit-UAF-ANGLE-OOB-Analysis★ 108
Analysis of CVE-2025-43529 (WebKit UAF) + CVE-2025-14174 (ANGLE OOB) exploit chain - iOS Safari
updated Sep 4, 2026
- jir4vv1t/CVE-2025-43529★ 86
exploit for cve-2025-43529
updated Aug 22, 2026
- GenericCoding/pois0nSword★ 66
A demonstration of read write using cve-2025-43529 and userland PAC bypass on iOS 26.1
updated Sep 5, 2026
- bjrjk/CVE-2025-43529★ 18
Root Cause Analysis for CVE-2025-43529, a UAF vulnerability due to incorrect DFG StoreBarrierInsertionPhase in JavaScriptCore.
updated Aug 22, 2026
- stationedK-06/DarkSword_analysis★ 2
Static analysis of the DarkSword iOS WebKit exploit chain — delivery, staging, and CVE breakdown (CVE-2025-31277, CVE-2025-43529)
updated Sep 1, 2026
- kmeps4/bugtest★ 1
CVE-2025-43529 Test
updated Mar 2, 2026
- SimoesCTT/Convergent-Time-Theory-Enhanced-iOS-Safari-RCE-CVE-2025-43529-★ 1
CTT-Enhanced iOS Safari Exploit (based on CVE-2025-43529)
updated Apr 14, 2026
- SimoesCTT/CTT-Apple-Silicon-Refraction★ 1
webkit_refraction.js (The 33-Layer WebGL Payload) This JavaScript payload uses the \alpha constant to create a high-frequency "Memory Shiver." It induces the Use-After-Free (UAF) in CVE-2025-43529 by desynchronizing the WebKit garbage collector from the GPU's Metal command buffer.
updated Feb 11, 2026
References
Frequently asked questions
What is CVE-2025-43529?
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.
How severe is CVE-2025-43529?
CVE-2025-43529 has a CVSS base score of 8.8 out of 10 (CVSS 3.1).
Is CVE-2025-43529 actively exploited in the wild?
Yes. CVE-2025-43529 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Dec 15, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-43529?
8.9% - meaning FIRST.org's EPSS model estimates a 8.9% probability this vulnerability will be exploited in the wild within 30 days (95% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-43529?
We found 8 public GitHub repositories referencing CVE-2025-43529, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2025-43529?
CVE-2025-43529 is classified under CWE-416 (CWE-416 Use After Free).
Cross-checked against
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