Harttle LiquidJS up to 10.27.0 Strip HTML Filter src/filters/html.ts infinite loop

Summaryinfo

A vulnerability marked as problematic has been reported in Harttle LiquidJS up to 10.27.0. This affects an unknown part of the file src/filters/html.ts of the component Strip HTML Filter. This manipulation causes infinite loop. The identification of this vulnerability is CVE-2026-61556. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Harttle LiquidJS up to 10.27.0 and classified as problematic. Affected by this vulnerability is an unknown code of the file src/filters/html.ts of the component Strip HTML Filter. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. From 10.26.0 until 10.27.1, the strip_html filter in src/filters/html.ts can enter an infinite loop when an input string contains <, includes at least one preceding character, and has no later >. In strip_html, the search for the next opener advances lt while the loop index remains unchanged when the closer search returns -1, and the equality-only stall guard does not exit because the loop index is less than lt. Reprocessing the same state indefinitely blocks template rendering and can cause denial of service with an input as short as a<. This issue is fixed in version 10.27.1.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-61556 since 07/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 10.27.1 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Harttle

Name

• LiquidJS

Version

• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.5
• 10.6
• 10.7
• 10.8
• 10.9
• 10.10
• 10.11
• 10.12
• 10.13
• 10.14
• 10.15
• 10.16
• 10.17
• 10.18
• 10.19
• 10.20
• 10.21
• 10.22
• 10.23
• 10.24
• 10.25
• 10.26
• 10.27.0

Website

• Product: https://github.com/harttle/liquidjs/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion