CVE-2026-34166

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{"affected": [{"affectedData": [{"product": "liquidjs", "vendor": "harttle", "versions": [{"status": "affected", "version": "< 10.25.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:liquidjs:liquidjs:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "D2AAC345-0EF3-40DC-928F-0A77E0779B5A", "versionEndExcluding": "10.25.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, the replace filter in LiquidJS incorrectly accounts for memory usage when the memoryLimit option is enabled. It charges str.length + pattern.length + replacement.length bytes to the memory limiter, but the actual output from str.split(pattern).join(replacement) can be quadratically larger when the pattern occurs many times in the input string. This allows an attacker who controls template content to bypass the memoryLimit DoS protection with approximately 2,500x amplification, potentially causing out-of-memory conditions. This vulnerability is fixed in 10.25.3."}, {"lang": "es", "value": "LiquidJS es un motor de plantillas compatible con Shopify / GitHub Pages en JavaScript puro. Antes de la versi\u00f3n 10.25.3, el filtro 'replace' en LiquidJS contabiliza incorrectamente el uso de memoria cuando la opci\u00f3n 'memoryLimit' est\u00e1 habilitada. Carga str.length + pattern.length + replacement.length bytes al limitador de memoria, pero la salida real de str.split(pattern).join(replacement) puede ser cuadr\u00e1ticamente mayor cuando el patr\u00f3n aparece muchas veces en la cadena de entrada. Esto permite a un atacante que controla el contenido de la plantilla eludir la protecci\u00f3n DoS de 'memoryLimit' con una amplificaci\u00f3n de aproximadamente 2,500x, lo que podr\u00eda causar condiciones de falta de memoria. Esta vulnerabilidad se corrige en la versi\u00f3n 10.25.3."}], "id": "CVE-2026-34166", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34166", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-10T20:36:50.442964Z", "version": "2.0.3"}}]}, "published": "2026-04-08T19:25:21.400", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/harttle/liquidjs/releases/tag/v10.25.3"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,10.25.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "liquidjs", "source": "cna", "vendor": "harttle"}, "product": "liquidjs", "vendor": "harttle"}], "analysis": {"en": {"generated_at": "2026-04-10T22:22:33.527269+00:00", "value": {"mitigation_remediation": ["Upgrade LiquidJS to version 10.25.3 or later."], "summary": {"action": "Immediate Patch", "impact": "Out\u2011of\u2011Memory Denial of Service"}, "threat_synthesis": {"affected_systems": "LiquidJS implementations bundled by Harttle are affected in all versions earlier than 10.25.3. The vulnerability exists in the patch\u2011free code base that ships with these older releases and is fixed in 10.25.3 and newer.", "description_and_impact": "The replace filter in LiquidJS miscalculates memory consumption when the memoryLimit option is active. It accounts only for the lengths of the source string, the pattern, and the replacement, yet the actual output from str.split(pattern).join(replacement) can explode quadratically when the pattern occurs many times. An attacker who controls template content can craft input that amplifies the output by roughly 2,500\u00d7, thereby evading the memory limiter and forcing an out\u2011of\u2011memory condition, which can crash the service or kill processes.", "risk_and_exploitability": "The CVSS score of 3.7 indicates a moderate severity. The EPSS score of less than 1\u202f% suggests a low likelihood of exploitation in the wild, and the vulnerability is not listed in CISA\u2019s KEV catalog. Exploitability requires the attacker to control template content and have the application run LiquidJS with the memoryLimit option enabled; no local privilege escalation or network attack vector is needed."}}}}, "created": "2026-04-08T20:12:44.638085+00:00", "updated": "2026-04-13T14:25:07.212878+00:00", "vendors": ["harttle", "harttle$PRODUCT$liquidjs"]}