CVE-2026-34166
LiquidJS has a Memory Limit Bypass via Quadratic Amplification in `replace` Filter
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, the replace filter in LiquidJS incorrectly accounts for memory usage when the memoryLimit option is enabled. It charges str.length + pattern.length + replacement.length bytes to the memory limiter, but the actual output from str.split(pattern).join(replacement) can be quadratically larger when the pattern occurs many times in the input string. This allows an attacker who controls template content to bypass the memoryLimit DoS protection with approximately 2,500x amplification, potentially causing out-of-memory conditions. This vulnerability is fixed in 10.25.3.
- Affected
- harttle · liquidjs
- CVSS v3.1 NVD
- 5.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS v3.1 GITHUB
- 3.7 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS
- 0.57% chance of exploitation in the next 30 days, 46th percentile
- Published
- 2026-04-08
- Updated
- 2026-04-10
Proof-of-concept exploits (1)
Security advisories
- harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx
- harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25