# CVE-2026-43740: Apple Safari and OSs memory disclosure via web content

Source: https://junglewise.ai/threats/cve-2026-43740-apple-safari-and-oss-memory-disclosure-via-web-content  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-29. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2026-43740 · Severity: info · CVSS 0 · Published 2026-06-29

Apple has released security updates for Safari, iOS, iPadOS, and macOS to address a vulnerability that could allow the disclosure of sensitive information. If a user visits a specially crafted website, the malicious content could potentially read data from the device's memory. This could lead to the exposure of private information handled by the web browser or operating system.

Technologies: [Apple iPadOS](https://junglewise.ai/threats/technologies/ipados), [Apple macOS Tahoe](https://junglewise.ai/threats/technologies/macos), [Apple Safari](https://junglewise.ai/threats/technologies/safari). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2026-43740 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-43740 being exploited in the wild.

**How severe is CVE-2026-43740?** Informational severity, with a CVSS score of 0, published 29 June 2026.

**Which products and versions are affected?** Apple iPadOS Before 26.5.2; Apple macOS Tahoe Before 26.5.2; Apple Safari Before 26.5.2.

**Is there a fix for CVE-2026-43740?** A patch was published on 2026-06-29. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-43740 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-43740?** Check whether you run Apple iPadOS, Apple macOS Tahoe or Apple Safari 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.

## Technical details

A memory handling vulnerability exists in Apple's web processing components affecting Safari, iOS, iPadOS, and macOS. The flaw is triggered when the system processes maliciously crafted web content, leading to an out-of-bounds read or similar memory mismanagement that results in the disclosure of process memory. An attacker can exploit this by enticing a user to visit a malicious webpage. Apple has addressed the issue by improving memory handling in Safari 26.5.2, iOS/iPadOS 26.5.2, and macOS Tahoe 26.5.2.

## Affected products

- Apple Safari Before 26.5.2
- Apple iOS and iPadOS Before 26.5.2
- Apple macOS Tahoe Before 26.5.2

## Timeline

- 2026-06-29: disclosed
- 2026-06-29: patched

## References

- [https://support.apple.com/en-us/127594](https://support.apple.com/en-us/127594)
- [https://support.apple.com/en-us/127595](https://support.apple.com/en-us/127595)
- [https://support.apple.com/en-us/127685](https://support.apple.com/en-us/127685)

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