What is the CVSS score of CVE-2026-49269?

CVE-2026-49269 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N. EPSS exploitation probability: 0.3%.

Which versions of N A are affected by CVE-2026-49269?

Apple M1 GPU processors contain a cross-process sandbox escape vulnerability that allows one application to steal cryptographic secrets from another through GPU register disclosure.

How to fix or mitigate CVE-2026-49269?

Within 24 hours, inventory all M1-based Mac systems in your environment and identify applications that process cryptographic secrets or utilize GPU acceleration. Within 7 days, assess risk based on workload isolation posture and whether systems run applications from untrusted sources. Within 30 days, execute a migration plan to relocate critical workloads to current-generation Apple Silicon (M2, M3, M4, or later); for M1 systems that cannot be immediately replaced, implement compensating controls including dedicated GPU resource allocation, strict process-level application sandboxing, and segregation of high-trust from low-trust applications onto separate physical systems.

N A CVE-2026-49269

EUVD-2026-38809 HIGH

Information Exposure (CWE-200)

2026-06-24 mitre

GHSA-vwgr-66jm-j45f

Information Disclosure Apple N A

8.6

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

8.6 HIGH

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Jul 22, 2026 - 21:03 vuln.today

CVE Published

Jun 24, 2026 - 00:00 cve.org

HIGH 8.6

CVE Published

Jun 24, 2026 - 00:00 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Apple M1 GPUs retain register file data between compute shader dispatches from different processes. A sandboxed Metal attacker app can run a GPU reader shader that reads stale register values left by a separate sandboxed victim app. In the proof of concept, GPUVictim.app generates a fresh random 128-bit secret using SecRandomCopyBytes and loads it into GPU registers. GPUAttacker.app, a separate sandboxed app, recovers the exact secret from stale GPU register state. NOTE: The vendor stated that this behavior affects only legacy hardware and has already been addressed at the hardware level in current-generation Apple Silicon.

AnalysisAI

Cross-process information disclosure in Apple M1 GPUs allows a sandboxed Metal application to recover secrets from another sandboxed process by reading stale GPU register-file contents left over between compute-shader dispatches. A demonstrated proof-of-concept (published gist) shows an attacker app fully recovering a fresh 128-bit SecRandomCopyBytes secret loaded into GPU registers by a separate victim app, breaking the sandbox isolation boundary. Publicly available exploit code exists, but this is not listed in CISA KEV and EPSS is low (0.30%); the vendor states the issue affects only legacy M1-class hardware and has been fixed at the hardware level in current-generation Apple Silicon.