CVE-2025-43375: 
Xcode vulnerability analysis and mitigation

CVE-2025-43375 is an improper input validation vulnerability in Apple Xcode's Dev Tools component that can cause a process crash when processing an overly large path value. It affects all versions of Xcode prior to 26, running on macOS Sequoia 15.6 and later. The vulnerability was discovered by Nathaniel Oh (@calysteon) and disclosed on September 15, 2025, with a patch released in Xcode 26. It carries a CVSS v3.1 base score of 5.5 (Medium) (Apple Advisory).

The vulnerability is classified as CWE-20 (Improper Input Validation) and stems from a path handling issue in Xcode's Dev Tools where insufficient validation allows an overly large path value to trigger a process crash. Apple addressed the issue with improved checks in Xcode 26. The attack vector is local, requires user interaction, and does not require elevated privileges — meaning a user must be induced to process a maliciously crafted path value within the affected component (Apple Advisory).

Successful exploitation results in a denial-of-service condition, specifically a process crash, with no impact on confidentiality or integrity. The scope is limited to the affected process on the local system, and there is no known potential for lateral movement or data exposure. The impact is confined to availability of the affected Xcode Dev Tools process (Apple Advisory).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for CVE-2025-43375. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.079%, indicating a very low probability of exploitation in the near term (Apple Advisory).

Apple has addressed this vulnerability in Xcode 26, released September 15, 2025, for macOS Sequoia 15.6 and later. Users should update to Xcode 26 or later via the Mac App Store or Apple Developer downloads. No configuration-based workarounds have been published; upgrading is the recommended remediation (Apple Advisory).

The vulnerability was credited to security researcher Nathaniel Oh (@calysteon), who also discovered the related CVE-2025-43370 in the same Xcode 26 release. No significant public commentary, vendor statements beyond the official advisory, or notable media coverage has been identified for this specific CVE (Apple Advisory).