CriticalVulnerability

CVE-2026-22686: Enclave VM sandbox escape via host Error object prototype chain

Source: NVD(opens in a new tab)
Identifier: CVE-2026-22686
Published: January 13, 2026
Record updated: October 9, 2026

Affected: enclave-vm < 2.7.0
Fixed in: 2.7.0
released January 8, 2026, 5 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.8%

Summary

CVE-2026-22686 affects enclave-vm, the sandbox component of Enclave, in versions prior to 2.7.0. When a tool invocation fails, enclave-vm passes a host-side Error object into sandboxed code, and that object keeps its host realm prototype chain. Untrusted code can walk that chain to the host Function constructor and run arbitrary JavaScript in the host Node.js runtime, reaching process.env, the filesystem and the network.

Mitigation

Fixed in 2.7.0.

Details

Scores and exploitation

CVSS score: 10(critical)
Patch available: Yes
EPSS: 0.8%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-94
CWE-693
Attack pattern (CAPEC): CAPEC-242

Affected

Packages: enclave-vm@< 2.7.0 (fixed: 2.7.0)

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Agent
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-22686

First tracked: February 15, 2026 at 08:53 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Topics

AI agents

Summary

Mitigation

Topics

Related items