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CVE-2026-72925

CVE-2026-72925 · SWC HTML minifier may allow script element breakout when minifying embedded JSON

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.1 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • swc

    Versions
    • < 1.15.47: Affected

    No fix published

  • html

    Versions
    • < 1.15.47-nightly-20260729.1: Affected

    No fix published

  • swc_html_minifier

    Versions
    • < 59.0.0: Affected

    No fix published

  • @swc/html npm

    Affected ranges
    • SEMVER: < 1.15.47-nightly-20260729.1

    Update to 1.15.47-nightly-20260729.1

  • swc_html_minifier crates.io

    Affected ranges
    • SEMVER: < 59.0.0

    Update to 59.0.0

Original sources

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