How severe is CVE-2026-33287?

CVE-2026-33287 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33287 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33287?

CVE-2026-33287 affects Liquidjs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33287?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33287 have an EU (EUVD) identifier?

Yes. CVE-2026-33287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16064.

When was CVE-2026-33287 published?

CVE-2026-33287 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33287

CVE-2026-33287 is a high-severity vulnerability in Liquidjs with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16064
Weakness: CWE-20
Affected product: Liquidjs
Published: 2026-03-26
Last modified: 2026-06-17

Description

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, the `replace_first` filter in LiquidJS uses JavaScript's `String.prototype.replace()` which interprets `$&` as a back reference to the matched substring. The filter only charges `memoryLimit` for the input string length, not the amplified output. An attacker can achieve exponential memory amplification (up to 625,000:1) while staying within the `memoryLimit` budget, leading to denial of service. Version 10.25.1 patches the issue.

Frequently asked questions

What is CVE-2026-33287?: LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, the `replace_first` filter in LiquidJS uses JavaScript's `String.prototype.replace()` which interprets `$&` as a back reference to the matched substring. The filter only charges `memoryLimit` for the input string length, not the amplified output. An attacker can achieve exponential memory amplification (up to 625,000:1) while staying within the `memoryLimit` budget, leading to denial of service. Version 10.25.1 patches the issue.
How severe is CVE-2026-33287?: CVE-2026-33287 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33287 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33287?: CVE-2026-33287 affects Liquidjs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33287?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33287 have an EU (EUVD) identifier?: Yes. CVE-2026-33287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16064.
When was CVE-2026-33287 published?: CVE-2026-33287 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:liquidjs:liquidjs:*:*:*:*:*:node.js:*:*

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