Arbitrary code execution via inspector DNS rebinding
Published Dec 5, 2022 · Updated Apr 30, 2025
DNS rebinding in the Node.js inspector before 14.21.1, 16.18.1, 18.12.1, and 19.0.1 allows remote attackers to execute arbitrary code. The IsAllowedHost check accepts invalid octal IPv4 text because IsIPAddress fails to reject it, causing browsers to resolve the host through DNS and permitting rebinding to the debugger. Exploitation requires an active --inspect session and grants control through the attached WebSocket debugger.
Summary
What happened
DNS rebinding in the Node.js inspector before 14.21.1, 16.18.1, 18.12.1, and 19.0.1 allows remote attackers to execute arbitrary code. The IsAllowedHost check accepts invalid octal IPv4 text because IsIPAddress fails to reject it, causing browsers to resolve the host through DNS and permitting rebinding to the debugger. Exploitation requires an active --inspect session and grants control through the attached WebSocket debugger.
The record
- CVE
- CVE-2022-43548
- Published
- Dec 5, 2022
- Updated
- Apr 30, 2025
- Vendor
- Node.js
- Product
- Node.js
- Classifications
- CWE-78, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 5, 2022CVE publishedPublication date reported by the CVE source.
- Apr 30, 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.
- Affected versionversion=10.0 <10.*
- Affected versionversion=11.0 <11.*
- Affected versionversion=12.0 <12.*
- Affected versionversion=13.0 <13.*
- Affected versionversion=14.0 <14.21.1
- Affected versionversion=15.0 <15.*
- Affected versionversion=16.0 <16.18.1
- Affected versionversion=17.0 <17.*
- Affected versionversion=18.0 <18.12.1
- Affected versionversion=19.0 <19.0.1
- Affected versionversion=4.0 <4.*
- Affected versionversion=5.0 <5.*
- Affected versionversion=6.0 <6.*
- Affected versionversion=7.0 <7.*
- Affected versionversion=8.0 <8.*
- Affected versionversion=9.0 <9.*
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
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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