PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-45618 harttle CVE debrief

CVE-2026-45618 is a critical vulnerability in LiquidJS, a Shopify/GitHub Pages compatible template engine. The issue allows for arbitrary code execution with crafted templates and was patched in version 10.26.0. This vulnerability affects LiquidJS deployments and requires immediate attention. Defenders should verify exposure and upgrade to version 10.26.0 or later. The CVSS score of 10 indicates its critical severity. It's essential to review and restrict template inputs to prevent crafted template exploitation and monitor LiquidJS deployments for suspicious activity.

Vendor
harttle
Product
liquidjs
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-09-16
Advisory published
2026-08-11
Advisory updated
2026-09-16

Who should care

Defenders responsible for LiquidJS deployments, developers using LiquidJS in their applications, and security teams assessing exposure to template engine vulnerabilities should be aware of this critical vulnerability.

Why it matters

CVE-2026-45618 is a critical vulnerability in LiquidJS that allows for arbitrary code execution with crafted templates. Defenders should prioritize verifying exposure and upgrading to version 10.26.0 or later. The vulnerability's CVSS score of 10 indicates its critical severity.

  • Potential for arbitrary code execution with crafted templates requires immediate attention
  • Verification of LiquidJS version and exposure is necessary to prevent exploitation
  • Upgrading to version 10.26.0 or later is crucial to mitigate the vulnerability

Technical summary

LiquidJS, a Shopify/GitHub Pages compatible template engine, is vulnerable to arbitrary code execution with crafted templates. The issue was patched in version 10.26.0. CVSS score: 10. This critical vulnerability requires defenders to verify exposure in LiquidJS deployments and upgrade to version 10.26.0 or later. The vulnerability's technical details indicate that it is essential to review and restrict template inputs to prevent crafted template exploitation.

Defensive priority

Defenders should prioritize verifying exposure in LiquidJS deployments and upgrading to version 10.26.0 or later.

Recommended defensive actions

  • Verify LiquidJS version and upgrade to 10.26.0 or later if necessary
  • Review and restrict template inputs to prevent crafted template exploitation
  • Monitor LiquidJS deployments for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its CVSS score, and patch information. However, additional information on affected deployments or exploitation attempts is not provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45618 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45618

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45618 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45618

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.