BIT-golang-2026-39823

vendorUSosv

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

view advisory published 2026-05-11Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-39823US	—	0.31% (24th)	—	2026-05-07
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 arou…

references

External citations — patches, advisories, analysis.

https://go.dev/cl/769920FIX
https://go.dev/issue/78913REPORT
https://groups.google.com/g/golang-announce/c/qcCIEXso47MARTICLE
https://nvd.nist.gov/vuln/detail/CVE-2026-39823WEB
https://pkg.go.dev/vuln/GO-2026-4982ADVISORY

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