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CVE-2026-39823

Bypass of meta content URL escaping causes XSS in html/template PUBLISHED

Description (CNA)

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

Affected (CNA)

Vendor / productVersions
Go standard library / html/templateaffected 0 before 1.25.10; affected 1.26.0-0 before 1.26.3

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.