# CVE-2025-43505: An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Xcode 26.1…

Source: https://junglewise.ai/threats/cve-2025-43505-an-out-of-bounds-write-issue-was-addressed-with-improved-input  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-04  
License: CC BY 4.0 with a link back

CVE-2025-43505 · Severity: high · CVSS 8.8 · Published 2025-11-04

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Xcode 26.1. Processing a maliciously crafted file may lead to heap corruption.

Technologies: [Apple Xcode](https://junglewise.ai/threats/technologies/xcode). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2025-43505 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-43505 being exploited in the wild.

**How severe is CVE-2025-43505?** High severity, with a CVSS score of 8.8, published 4 November 2025.

**Which products and versions are affected?** Apple Xcode. The advisory does not name versions.

**Is there a fix for CVE-2025-43505?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-43505?** Check whether you run Apple Xcode. 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.

## Affected products

- Apple Xcode

## Related threats

- [Apple Xcode symlink handling arbitrary file read](https://junglewise.ai/threats/cve-2026-112605-this-issue-was-addressed-with-improved-handling-of-symlinks-this)
- [Apple Xcode Instruments authorization issue](https://junglewise.ai/threats/cve-2026-112602-an-authorization-issue-was-addressed-with-improved-state)
- [Apple Xcode sandbox escape in library validation](https://junglewise.ai/threats/cve-2026-86949-this-issue-was-addressed-by-enforcing-library-validation-on-the)
- [Apple Xcode sandbox escape via library validation](https://junglewise.ai/threats/cve-2026-86948-this-issue-was-addressed-by-enforcing-library-validation-on-the)
- [Apple Xcode CoreSymbolication input validation flaw](https://junglewise.ai/threats/cve-2026-86875-an-input-validation-issue-was-addressed-with-improved-input)