CVE-2026-44451Public exploitNetwork attack vector

Browser code execution via DOM ref sandbox escape

Published May 26, 2026 · Updated May 26, 2026

Sandbox escape in Prolix OCs Lumiverse before 0.9.7 allows remote attackers to execute browser code through a malicious theme pack. The component override transpiler evaluates TSX with new Function, while split forbidden identifiers and a live DOM ref recover the real window despite regex filtering and shadowed globals. Exploitation requires the victim to import the pack, enable its override, and view a chat in Bubble layout, giving the payload the victim session's same-origin browser privileges.

CVSS severity9.3
Critical
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Prolix OCs Lumiverse before 0.9.7 allows remote attackers to execute browser code through a malicious theme pack. The component override transpiler evaluates TSX with new Function, while split forbidden identifiers and a live DOM ref recover the real window despite regex filtering and shadowed globals. Exploitation requires the victim to import the pack, enable its override, and view a chat in Bubble layout, giving the payload the victim session's same-origin browser privileges.

The record

CVE
CVE-2026-44451
Published
May 26, 2026
Updated
May 26, 2026
Vendor
Prolix OCs
Product
Lumiverse
Classifications
CWE-693, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record 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=< 0.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Prolix OCs · Lumiverseversion=< 0.9.7

Published CVSS scores

9.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1204.002User Execution: Malicious File

Public exploit references

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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