Invoking duplicate attributes can cause XSS in golang.org/x/net/html
cve-program · CVE-2026-27136
PublishedParsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Read the publisher's advisoryeuvd · EUVD-2026-31451
PublishedParsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Read the publisher's advisorynvd · CVE-2026-27136
PublishedParsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Read the publisher's advisoryosv · GO-2026-5030
PublishedParsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-27136 · CVE overview and exploitation status
cve-program · CVE-2026-27136
- https://go.dev/issue/79575
- https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
- https://go.dev/cl/781685
- https://pkg.go.dev/vuln/GO-2026-5030
euvd · EUVD-2026-31451
- https://go.dev/issue/79575
- https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
- https://go.dev/cl/781685
- https://pkg.go.dev/vuln/GO-2026-5030
nvd · CVE-2026-27136
- https://go.dev/cl/781685
- https://go.dev/issue/79575
- https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
- https://pkg.go.dev/vuln/GO-2026-5030
osv · GO-2026-5030
Related changes
Linked by CVE identifier- Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering. · Advisory content revised · 15 Nov 2026
- Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering. · Advisory content revised · 13 Nov 2026
- Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering. · Advisory content revised · 9 Nov 2026
- Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering. · Advisory content revised · 1 Nov 2026