CVE-2026-33287Public exploitNetwork attack vector

Service interruption via uncharged replacement expansion

Published Mar 26, 2026 · Updated Mar 26, 2026

Uncontrolled resource consumption in Harttle LiquidJS before 10.25.1 allows remote attackers to interrupt services through crafted templates. The replace_first filter passes attacker-controlled replacement text to String.prototype.replace but charges only the input length to memoryLimit, leaving expanded output uncounted. Reachability requires an application to render attacker-supplied Liquid templates; chained $& expansions consume memory and block the Node.js event loop.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Harttle LiquidJS before 10.25.1 allows remote attackers to interrupt services through crafted templates. The replace_first filter passes attacker-controlled replacement text to String.prototype.replace but charges only the input length to memoryLimit, leaving expanded output uncounted. Reachability requires an application to render attacker-supplied Liquid templates; chained $& expansions consume memory and block the Node.js event loop.

The record

CVE
CVE-2026-33287
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
LiquidJS
Product
LiquidJS
Classifications
CWE-400, CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.25.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LiquidJS · LiquidJSversion=< 10.25.1

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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