Description
SWC is a TypeScript / JavaScript compiler written in Rust. Prior to @swc/html 1.15.47-nightly-20260729.1 and swc_html_minifier 59.0.0, the minifyJson processing in crates/swc_html_minifier/src/lib.rs parsed and serialized attacker-controlled JSON in application/json and application/ld+json script elements without the escape_json_for_html_script behavior to re-escape less-than signs, allowing a closing script sequence to terminate the element early and execute script in the generated page's origin. This issue is fixed in @swc/html 1.15.47-nightly-20260729.1 and swc_html_minifier 59.0.0.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
swc-project swc
< 1.15.47affected
@swc html
< 1.15.47-nightly-20260729.1affected
swc-project swc_html_minifier
< 59.0.0affected
References
- https://github.com/swc-project/swc/security/advisories/GHSA-5qr2-v392-m9g8 ↗
- https://github.com/swc-project/swc/pull/12080 ↗
- https://github.com/swc-project/swc/commit/e1877b44bdac8abc9fd51e984d584f40f6999832 ↗
- https://github.com/swc-project/swc/releases/tag/v1.15.47 ↗
- https://github.com/swc-project/swc/releases/tag/v1.15.47-nightly-20260729.1 ↗