CVE-2026-72925

Summary

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 Software

Weaknesses

• CWE-79: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
• CWE-116: CWE-116: Improper Encoding or Escaping of Output

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

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

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