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GO-2026-4980

Escaper bypass leads to XSS in html/template

Details

If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.

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Affected packages

Go / stdlib
Introduced in: 0 Fixed in: 1.25.10
Fix go get stdlib@v1.25.10

References