GO-2026-4982

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Source
https://pkg.go.dev/vuln/GO-2026-4982
Import Source
https://vuln.go.dev/ID/GO-2026-4982.json
JSON Data
https://api.test.osv.dev/v1/vulns/GO-2026-4982
Aliases
Downstream
Related
Published
2026-05-07T19:21:40Z
Modified
2026-08-31T10:26:51Z
Summary
Bypass of meta content URL escaping causes XSS in html/template
Details

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

Database specific 
{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-4982"
}
References
Credits
    • Samy Ghannad

Affected packages

Go / stdlib

Package

Name
stdlib
View open source insights on deps.dev
Purl
pkg:golang/stdlib

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.25.10
Introduced
1.26.0-0
Fixed
1.26.3

Ecosystem specific 

{
    "imports": [
        {
            "path": "html/template",
            "symbols": [
                "Template.Execute",
                "Template.ExecuteTemplate",
                "tMetaContent"
            ]
        }
    ]
}

Database specific

source 
"https://vuln.go.dev/ID/GO-2026-4982.json"