# CVE-2026-86875: Apple Xcode CoreSymbolication input validation flaw

Source: https://junglewise.ai/threats/cve-2026-86875-an-input-validation-issue-was-addressed-with-improved-input  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-86875 · Severity: info · Published 2026-10-20

CoreSymbolication is a macOS component within Xcode that processes binary files for debugging and analysis. A maliciously crafted binary file can trigger an input validation flaw that causes unexpected application termination, creating a denial-of-service risk for developers using Xcode.

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

## Quick answers

**Is CVE-2026-86875 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86875 being exploited in the wild.

**How severe is CVE-2026-86875?** Informational severity, published 20 October 2026.

**Which products and versions are affected?** Apple Xcode Before 27.

**Is there a fix for CVE-2026-86875?** Yes: fixed in Xcode 27. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-86875 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-86875?** Check whether you run Apple Xcode 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 Xcode 27

## Technical details

CVE-2026-86875 is an input validation issue in Apple's CoreSymbolication library that processes binary metadata. The vulnerability is triggered by parsing a maliciously crafted binary file and can lead to unexpected app termination. The issue was fixed by implementing improved input validation in Xcode 27.

## Affected products

- Apple Xcode Before 27

## Timeline

- 2026-10-19: disclosed
- 2026-09-14: patched: Xcode 27 released on App Store

## References

- [https://support.apple.com/en-us/149040](https://support.apple.com/en-us/149040)

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