EUVD-2026-63090Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-accessible template endpoints, no auth required for submission, crash-only outcome yields A:H with C:N and I:N as no data access or modification occurs.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.27.2, the join filter in src/filters/array.ts computes complexity from array.length and separator length instead of the total string length produced by array.join(sep). The concat filter can cheaply double arrays of references, after which join materializes the referenced content while charging only for element count, allowing a template to exceed a configured memoryLimit by a large factor. The sibling array_to_sentence_string filter in src/filters/string.ts has the same accounting defect, and a crafted template can allocate toward V8's string or process memory limit and crash the process. This issue is fixed in version 10.27.2.
AnalysisAI
Memory accounting bypass in LiquidJS prior to 10.27.2 enables remote denial of service by exhausting V8 heap or process memory limits through crafted templates. The join, array_to_sentence_string, json, and inspect filters computed resource consumption based on element count rather than actual output string length, allowing the concat filter to be chained to exponentially amplify array size without proportional memoryLimit charges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the application passes user-supplied or attacker-controlled Liquid template content to a LiquidJS rendering context, and that the template can use the concat filter combined with join, array_to_sentence_string, json, or inspect filters on attacker-influenced data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) accurately reflects the threat model for applications that accept user-supplied Liquid templates. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to LiquidJS version 10.27.2 or later, which corrects memory accounting in the join, array_to_sentence_string, json, and inspect filters to use actual output string length. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all applications using LiquidJS, particularly those accepting user-supplied template content, and assess the network exposure of affected services; simultaneously implement enhanced monitoring of memory consumption on production systems running LiquidJS. …
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Unbounded memory allocation in LiquidJS pop filter (prior to 10.27.1) allows remote attackers to exhaust server memory b
The package liquidjs before 10.0.0 are vulnerable to Information Exposure when ownPropertyOnly parameter is set to False
Infinite-loop denial of service in LiquidJS affects the strip_html filter across versions 10.26.0 through 10.27.0, allow
liquidjs is a Shopify / GitHub Pages compatible template engine in pure JavaScript. versions up to 10.25.0 is affected b
Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today