An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-86876)
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, watchOS 27. A sandboxed process may be able to circumvent sandbox restrictions.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-86876) involves an out-of-bounds write due to insufficient bounds checking. A sandboxed process may exploit this flaw to bypass sandbox restrictions, potentially leading to limited confidentiality and integrity impacts. The issue has been resolved by Apple through improved bounds checking in the specified OS versions.
Potential Impact
The vulnerability allows a sandboxed process to potentially circumvent sandbox restrictions, which could lead to partial compromise of confidentiality and integrity within the affected environment. There is no indication of availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available and has been implemented by Apple in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, and watchOS 27. Users and administrators should apply these updates to remediate the vulnerability.
An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-86876)
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, watchOS 27. A sandboxed process may be able to circumvent sandbox restrictions.
CVSS v3.1
Score 5.2medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-86876) involves an out-of-bounds write due to insufficient bounds checking. A sandboxed process may exploit this flaw to bypass sandbox restrictions, potentially leading to limited confidentiality and integrity impacts. The issue has been resolved by Apple through improved bounds checking in the specified OS versions.
Potential Impact
The vulnerability allows a sandboxed process to potentially circumvent sandbox restrictions, which could lead to partial compromise of confidentiality and integrity within the affected environment. There is no indication of availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available and has been implemented by Apple in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, and watchOS 27. Users and administrators should apply these updates to remediate the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9rgh-hpwq-qxmv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86876"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8a16455bf5e2cf5f3b7b0
Added to database: 09/15/2026, 01:37:40 UTC
Last enriched: 09/15/2026, 01:42:11 UTC
Last updated: 09/15/2026, 03:01:22 UTC
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.