# CVE-2026-86929: Apple macOS out-of-bounds write in Accelerate Framework

Source: https://junglewise.ai/threats/cve-2026-86929-an-out-of-bounds-write-issue-was-addressed-with-improved-bounds  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-86929 · Severity: high · CVSS 8.8 · Published 2026-10-26

The Accelerate Framework is a low-level performance library used by macOS to process images and media files. A flaw allows attackers to trigger an out-of-bounds write by crafting a malicious image file, potentially leading to arbitrary code execution with the privileges of any application processing the file. This affects multiple macOS versions but has been patched in recent security updates.

Technologies: [Apple macOS Golden Gate](https://junglewise.ai/threats/technologies/macos-golden-gate), [Apple macOS Sequoia](https://junglewise.ai/threats/technologies/macos). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2026-86929 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86929 being exploited in the wild.

**How severe is CVE-2026-86929?** High severity, with a CVSS score of 8.8, published 26 October 2026.

**Which products and versions are affected?** Apple macOS Golden Gate before 27; Apple macOS Sequoia before 15.8.2; Apple macOS Tahoe before 26.7.2.

**Is there a fix for CVE-2026-86929?** Yes: fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-86929 attacked?** It is attacked over the network or with local access, in an operating system.

**Am I affected by CVE-2026-86929?** Check whether you run Apple macOS Golden Gate, Apple macOS Sequoia or Apple macOS Tahoe at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2

## Technical details

An out-of-bounds write vulnerability exists in the Accelerate Framework when processing maliciously crafted image files. The vulnerability stems from insufficient bounds checking during image processing operations. An attacker can exploit this by providing a specially crafted image file that an application processes, potentially achieving arbitrary code execution depending on sandbox constraints and application privileges.

## Affected products

- Apple macOS Golden Gate before 27
- Apple macOS Sequoia before 15.8.2
- Apple macOS Tahoe before 26.7.2

## Timeline

- 2026-10-26: disclosed

## References

- [https://support.apple.com/en-us/149035](https://support.apple.com/en-us/149035)
- [https://support.apple.com/en-us/149522](https://support.apple.com/en-us/149522)

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