| { |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0", |
| "cveMetadata": { |
| "cveId": "CVE-2026-39823" |
| }, |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc" |
| }, |
| "title": "Bypass of meta content URL escaping causes XSS in html/template", |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a \u003cmeta\u003e tag's \u003ccontent\u003e attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the \u003ccontent\u003e attribute, the escaper would fail to similarly escape it, leading to XSS." |
| } |
| ], |
| "affected": [ |
| { |
| "vendor": "Go standard library", |
| "product": "html/template", |
| "collectionURL": "https://pkg.go.dev", |
| "packageName": "html/template", |
| "versions": [ |
| { |
| "version": "0", |
| "lessThan": "1.25.10", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "1.26.0-0", |
| "lessThan": "1.26.3", |
| "status": "affected", |
| "versionType": "semver" |
| } |
| ], |
| "programRoutines": [ |
| { |
| "name": "tMetaContent" |
| }, |
| { |
| "name": "Template.Execute" |
| }, |
| { |
| "name": "Template.ExecuteTemplate" |
| } |
| ], |
| "defaultStatus": "unaffected" |
| } |
| ], |
| "problemTypes": [ |
| { |
| "descriptions": [ |
| { |
| "lang": "en", |
| "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://go.dev/issue/78913" |
| }, |
| { |
| "url": "https://go.dev/cl/769920" |
| }, |
| { |
| "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M" |
| }, |
| { |
| "url": "https://pkg.go.dev/vuln/GO-2026-4982" |
| } |
| ], |
| "credits": [ |
| { |
| "lang": "en", |
| "value": "Samy Ghannad" |
| } |
| ] |
| } |
| } |
| } |
