CVE-2025-43263

Sandbox escape with arbitrary file access

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper access control in IDE CoreML in Apple Xcode before 26 allows local users to read and write files outside the app sandbox. Apple states only that improved checks addressed the issue and has not disclosed the specific IDE CoreML validation failure or file-access path. Exploitation requires a local app to be run by a user; successful abuse bypasses sandbox boundaries for file confidentiality and integrity.

CVSS severity7.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in IDE CoreML in Apple Xcode before 26 allows local users to read and write files outside the app sandbox. Apple states only that improved checks addressed the issue and has not disclosed the specific IDE CoreML validation failure or file-access path. Exploitation requires a local app to be run by a user; successful abuse bypasses sandbox boundaries for file confidentiality and integrity.

The record

CVE
CVE-2025-43263
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
Apple
Product
Xcode
Classifications
CWE-284, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <26

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · Xcodeversion=unspecified <26

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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