---
title: "CVE-2026-65391: Apple Safari - Out of Bounds Write"
description: "Apple Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS contain an out-of-bounds write caused by insufficient bounds checking in web content processing, letting attackers cause memory corruption remotely, exploit requires crafted web content."
url: https://panop.io/threat-heartbeat/CVE-2026-65391/
---

# CVE-2026-65391 Apple Safari - Out of Bounds Write

Apple Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS contain an out-of-bounds write caused by insufficient bounds checking in web content processing, letting attackers cause memory corruption remotely, exploit requires crafted web content.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.41% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-65391)

## Details

Type

Out of Bounds Write

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-190](https://cwe.mitre.org/data/definitions/190.html)

## Vendor fix

Update to Safari 26.6.1, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-65391](https://nvd.nist.gov/vuln/detail/CVE-2026-65391)
- [https://support.apple.com/en-us/149038](https://support.apple.com/en-us/149038)
- [https://support.apple.com/en-us/148281](https://support.apple.com/en-us/148281)
- [https://support.apple.com/en-us/148282](https://support.apple.com/en-us/148282)
- [https://support.apple.com/en-us/148286](https://support.apple.com/en-us/148286)
- [https://support.apple.com/en-us/149036](https://support.apple.com/en-us/149036)
- [https://support.apple.com/en-us/149037](https://support.apple.com/en-us/149037)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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