CVE-2026-72925
SWC HTML minifier may allow script element breakout when minifying embedded JSON
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 CWE-116 |
| Vendor | swc-project |
| Product | swc |
| Published | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
swc-project / swc
< 1.15.47
@swc / html
< 1.15.47-nightly-20260729.1
swc-project / swc_html_minifier
< 59.0.0
References
github.com: https://github.com/swc-project/swc/security/advisories/GHSA-5qr2-v392-m9g8 github.com: https://github.com/swc-project/swc/pull/12080 github.com: https://github.com/swc-project/swc/commit/e1877b44bdac8abc9fd51e984d584f40f6999832 github.com: https://github.com/swc-project/swc/releases/tag/v1.15.47 github.com: https://github.com/swc-project/swc/releases/tag/v1.15.47-nightly-20260729.1