CVE-2023-2319Network attack vector

Sandbox escape via cross-realm magic-comment objects

Published May 17, 2023 · Updated Jan 22, 2025

Sandbox escape in Red Hat PCS 0.11.4-6.el9 allows remote attackers to access the Node.js global object through crafted Webpack magic comments. JavascriptParser evaluates magic-comment option objects in a VM context and copies them directly into host options, preserving cross-realm references. Exploitation requires attacker-controlled content to reach the magic-comment parser; the retained reference exposes the host Node.js global object.

CVSS severity9.8
Critical
EPSS probability0.97%
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 Red Hat PCS 0.11.4-6.el9 allows remote attackers to access the Node.js global object through crafted Webpack magic comments. JavascriptParser evaluates magic-comment option objects in a VM context and copies them directly into host options, preserving cross-realm references. Exploitation requires attacker-controlled content to reach the magic-comment parser; the retained reference exposes the host Node.js global object.

The record

CVE
CVE-2023-2319
Published
May 17, 2023
Updated
Jan 22, 2025
Vendor
Red Hat
Product
PCS
Classifications
T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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=Affects pcs v0.11.4-6.el9, Fixed in pcs v0.11.4-7.el9_2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · PCSversion=Affects pcs v0.11.4-6.el9, Fixed in pcs v0.11.4-7.el9_2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

T1059.007JavaScript/JScript

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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