Process crash via undercounted join output
Published Aug 19, 2026 · Updated Aug 19, 2026
Resource consumption in LiquidJS before 10.27.2 allows attackers to crash the process via crafted templates that bypass memoryLimit. The join filter in src/filters/array.ts charges memoryLimit from array length and separator length rather than the full string produced by array.join(sep), and the sibling array_to_sentence_string filter in src/filters/string.ts repeats the same accounting error. Exploitation requires an application to render attacker-influenced templates with memoryLimit enabled; concat can cheaply duplicate references until join materializes a much larger string and drives V8 or process memory exhaustion.
Summary
What happened
Resource consumption in LiquidJS before 10.27.2 allows attackers to crash the process via crafted templates that bypass memoryLimit. The join filter in src/filters/array.ts charges memoryLimit from array length and separator length rather than the full string produced by array.join(sep), and the sibling array_to_sentence_string filter in src/filters/string.ts repeats the same accounting error. Exploitation requires an application to render attacker-influenced templates with memoryLimit enabled; concat can cheaply duplicate references until join materializes a much larger string and drives V8 or process memory exhaustion.
The record
- CVE
- CVE-2026-69222
- Published
- Aug 19, 2026
- Updated
- Aug 19, 2026
- Vendor
- LiquidJS
- Product
- LiquidJS
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 19, 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?
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- Affected versionversion=< 10.27.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Advisory proof of concept templateproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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