CVE-2026-39826

UNKNOWN 0.0

Escaper bypass leads to XSS in html/template

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	go standard library
Product	html/template
Published	May 7, 2026

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Affected Versions

Go standard library / html/template

0 < 1.25.10 1.26.0-0 < 1.26.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/issue/78981 go.dev: https://go.dev/cl/771180 groups.google.com: https://groups.google.com/g/golang-announce/c/qcCIEXso47M pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-4980

Credits

Mundur (https://github.com/M0nd0R)