CVE-2026-43656: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple iOS and iPadOS
CVE-2026-43656 is an out-of-bounds write vulnerability in Apple iOS and iPadOS that occurs when parsing a maliciously crafted file. This can cause an unexpected app termination. The issue has been addressed by Apple with improved input validation and fixed in iOS 18. 7. 9, iPadOS 18. 7. 9, iOS 26. 5, iPadOS 26. 5, and several macOS versions. No known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write triggered by parsing specially crafted files on Apple iOS and iPadOS devices. The flaw can cause applications to terminate unexpectedly, potentially impacting user experience or stability. Apple has fixed the issue in multiple recent OS versions by improving input validation. No CVSS score is available, and no evidence of active exploitation exists. The vulnerability affects multiple Apple platforms including iOS, iPadOS, and macOS.
Potential Impact
The impact is limited to unexpected application termination caused by processing malicious files. There is no indication of code execution, privilege escalation, or data compromise in the provided information. The disruption is primarily a denial-of-service condition at the app level.
Mitigation Recommendations
Apple has released fixes in iOS 18.7.9, iPadOS 18.7.9, iOS 26.5, iPadOS 26.5, and corresponding macOS updates. Users and administrators should apply these official updates to remediate the vulnerability. Patch status is not explicitly confirmed beyond these versions, so verifying with Apple's official security advisories is recommended before taking further action.
CVE-2026-43656: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple iOS and iPadOS
Description
CVE-2026-43656 is an out-of-bounds write vulnerability in Apple iOS and iPadOS that occurs when parsing a maliciously crafted file. This can cause an unexpected app termination. The issue has been addressed by Apple with improved input validation and fixed in iOS 18. 7. 9, iPadOS 18. 7. 9, iOS 26. 5, iPadOS 26. 5, and several macOS versions. No known exploits are reported in the wild.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write triggered by parsing specially crafted files on Apple iOS and iPadOS devices. The flaw can cause applications to terminate unexpectedly, potentially impacting user experience or stability. Apple has fixed the issue in multiple recent OS versions by improving input validation. No CVSS score is available, and no evidence of active exploitation exists. The vulnerability affects multiple Apple platforms including iOS, iPadOS, and macOS.
Potential Impact
The impact is limited to unexpected application termination caused by processing malicious files. There is no indication of code execution, privilege escalation, or data compromise in the provided information. The disruption is primarily a denial-of-service condition at the app level.
Mitigation Recommendations
Apple has released fixes in iOS 18.7.9, iPadOS 18.7.9, iOS 26.5, iPadOS 26.5, and corresponding macOS updates. Users and administrators should apply these official updates to remediate the vulnerability. Patch status is not explicitly confirmed beyond these versions, so verifying with Apple's official security advisories is recommended before taking further action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.639Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028769cbff5d86108b6dfa
Added to database: 5/12/2026, 1:50:33 AM
Last enriched: 5/12/2026, 2:06:48 AM
Last updated: 5/12/2026, 3:34:02 AM
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.