FKIE_CVE-2026-45617

Vulnerability from fkie_nvd - Published: 2026-06-17 23:17 - Updated: 2026-06-22 18:27
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the built-in strip_html filter uses a regex containing four flawed lazy-quantified alternatives, leading to ReDoS via quadratic backtracking. When the input contains many <script, <style, or <!-- opener tokens without matching closers, the V8 regex engine performs O(N²) backtracking, blocking the Node.js event loop. A single ~350 KB request ('<script'.repeat(50000)) stalls the process for ~10 seconds; cost grows quadratically with input size. The default memoryLimit: Infinity does not bound regex CPU, and even when configured strip_html only charges str.length to the limit — the regex itself runs unbounded. A single unauthenticated request containing crafted untrusted input can cause severe event-loop blocking and CPU amplification that saturates Node.js workers while bypassing memoryLimit protections. This issue has been fixed in version 10.26.0.
References
security-advisories@github.comhttps://github.com/harttle/liquidjs/commit/3616a744b9abeb425c217b340a2397d46176afb8
security-advisories@github.comhttps://github.com/harttle/liquidjs/releases/tag/v10.26.0
security-advisories@github.comhttps://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "liquidjs",
          "vendor": "harttle",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 10.26.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the built-in strip_html filter uses a regex containing four flawed lazy-quantified alternatives, leading to ReDoS via quadratic backtracking. When the input contains many \u003cscript, \u003cstyle, or \u003c!-- opener tokens without matching closers, the V8 regex engine performs O(N\u00b2) backtracking, blocking the Node.js event loop. A single ~350 KB request (\u0027\u003cscript\u0027.repeat(50000)) stalls the process for ~10 seconds; cost grows quadratically with input size. The default memoryLimit: Infinity does not bound regex CPU, and even when configured strip_html only charges str.length to the limit \u2014 the regex itself runs unbounded.  A single unauthenticated request containing crafted untrusted input can cause severe event-loop blocking and CPU amplification that saturates Node.js workers while bypassing memoryLimit protections. This issue has been fixed in version 10.26.0."
    }
  ],
  "id": "CVE-2026-45617",
  "lastModified": "2026-06-22T18:27:30.807",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45617",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-18T15:46:01.767622Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-17T23:17:04.033",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/harttle/liquidjs/commit/3616a744b9abeb425c217b340a2397d46176afb8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/harttle/liquidjs/releases/tag/v10.26.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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