Quick answers
- Is CVE-2026-43703 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-43703 being exploited in the wild.
- How severe is CVE-2026-43703?
- Informational severity, with a CVSS score of 6.1, published 29 June 2026.
- Which products and versions are affected?
- Apple iPadOS < 26.5.2; Apple macOS < 26.5.2.
- Is there a fix for CVE-2026-43703?
- 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-2026-43703 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-43703?
- Check whether you run Apple iPadOS or Apple macOS 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 operating systems (iOS, iPadOS, and macOS) when processing web content. The root cause is improper memory management, which can be triggered by a remote attacker who entices a user to visit a maliciously crafted webpage. Successful exploitation results in a denial-of-service (DoS) condition via an unexpected process crash. Apple has addressed this issue with improved memory handling in iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.
Affected products
- Apple iOS and iPadOS < 26.5.2
- Apple macOS Tahoe < 26.5.2
Timeline
- 2026-06-29: disclosed
- 2026-06-29: patched