CVE-2026-92953 patriksimek CVE debrief

Who should care

Defenders responsible for vm2 deployments should assess exposure and prioritize remediation due to the critical severity of the vulnerability. This includes operators, platform administrators, vulnerability management teams, and security teams who manage or are impacted by vm2 environments. The potential for host-created typed arrays to observe attacker-controlled properties necessitates prompt verification of vm2 versions and application of vendor-provied

Why it matters

CVE-2026-92953 is a critical vulnerability in vm2 that allows for prototype pollution via TypedArray, potentially impacting host-created typed arrays.

• Potential for host-created typed arrays to observe attacker-controlled properties
• Need for verification of vm2 versions and exposure
• Priority for applying vendor remediation

Technical summary

vm2 versions from 3.11.0 before 3.11.8 fail to protect host TypedArray and ArrayBuffer prototypes from sandbox mutation. Attackers can use prototype-walking primitives to reach and modify host Uint8Array.prototype, %TypedArray%.prototype, and ArrayBuffer.prototype. This allows host-created typed arrays to observe attacker-controlled properties after VM.run() returns. The vulnerability is critical, with a CVSS score of 9.3, indicating a high severity impact on confidentiality, integrity, and availability. Defenders should prioritize verifying vm2 versions and assessing exposure to this vulnerability.

Defensive priority

Defenders should prioritize verifying vm2 versions and assessing exposure.

Recommended defensive actions

• Verify vm2 version and assess exposure
• Review and apply vendor remediation
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Plan vendor-supported updates through normal change control

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in vm2 versions from 3.11.0 before 3.11.8. The vulnerability allows for prototype pollution via TypedArray, potentially impacting host-created typed arrays. Evidence is limited to public CVE and NVD records, which may not cover all affected deployments or scenarios. Defenders should verify vm2 versions, assess exposure, and apply remediation based on vendor guidance.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.