CVE-2026-45357
LiquidJS: Memory and render limit bypass via unbounded width padding in `date` filter (strftime)
Description
LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the date filter's strftime implementation parses width specifiers like %9999999d and forwards the captured width unchecked into pad()/padStart(), leading to memory and render limit bypass. In src/util/underscore.ts, the pad loop performs unbounded string concatenation without consulting the Context's memoryLimit or renderLimit, so a single small template ({{ x | date: '%5000000d' }}) produces megabytes of output and unbounded CPU. The memoryLimit and renderLimit options the docs (src/liquid-options.ts:87-92) advertise as DoS controls — and which the docstring explicitly mentions for strftime — are entirely bypassed. Exploitation can cause large memory allocations, high CPU usage, or OOM crashes per render. This issue has been fixed in version 10.26.0.
INFO
Published Date :
June 17, 2026, 11:17 p.m.
Last Modified :
Oct. 26, 2026, 11:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update LiquidJS to version 10.26.0.
- Apply patches if updating is not possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45357.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45357 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45357
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45357 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45357 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: liquidjs de harttle, Description: LiquidJS es un motor de plantillas compatible con Shopify/GitHub Pages escrito en JavaScript puro. En las versiones 10.25.7 e inferiores, la implementación de strftime del filtro de fecha analiza especificadores de ancho como %9999999d y reenvía el ancho capturado sin verificar a pad()/padStart(), lo que lleva a la omisión de los límites de memoria y renderizado. En src/util/underscore.ts, el bucle de relleno realiza una concatenación de cadenas ilimitada sin consultar memoryLimit o renderLimit del Contexto, por lo que una única plantilla pequeña ({{ x | date: ’%5000000d’ }}) produce megabytes de salida y un uso ilimitado de CPU. Las opciones memoryLimit y renderLimit que la documentación (src/liquid-options.ts:87-92) anuncia como controles de DoS -y que la cadena de documentación menciona explícitamente para strftime- son completamente omitidas. La explotación puede causar grandes asignaciones de memoria, alto uso de CPU o fallos OOM por renderizado. Este problema ha sido solucionado en la versión 10.26.0. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 18, 2026
Action Type Old Value New Value Added Reference https://github.com/harttle/liquidjs/security/advisories/GHSA-hh27-hf48-9f5q Added SSVC {'id': 'CVE-2026-45357', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-18T12:48:36.994250Z'} -
New CVE Received by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'harttle', 'product': 'liquidjs', 'versions': [{'status': 'affected', 'version': '< 10.26.0'}]}] Added Description LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the date filter's strftime implementation parses width specifiers like %9999999d and forwards the captured width unchecked into pad()/padStart(), leading to memory and render limit bypass. In src/util/underscore.ts, the pad loop performs unbounded string concatenation without consulting the Context's memoryLimit or renderLimit, so a single small template ({{ x | date: '%5000000d' }}) produces megabytes of output and unbounded CPU. The memoryLimit and renderLimit options the docs (src/liquid-options.ts:87-92) advertise as DoS controls — and which the docstring explicitly mentions for strftime — are entirely bypassed. Exploitation can cause large memory allocations, high CPU usage, or OOM crashes per render. This issue has been fixed in version 10.26.0. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added Reference https://github.com/harttle/liquidjs/commit/3129d46dc95efa357b00e5a57ee1af80a13d72ed Added Reference https://github.com/harttle/liquidjs/releases/tag/v10.26.0 Added Reference https://github.com/harttle/liquidjs/security/advisories/GHSA-hh27-hf48-9f5q