CVE-2026-25681

MEDIUM

Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

Title source: cna

Description

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.

References (4)

Core 4

Core References

https://go.dev/issue/79574

https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8

https://go.dev/cl/781703

https://pkg.go.dev/vuln/GO-2026-5029

Scores

CVSS v3 6.1

EPSS 0.0024

EPSS Percentile 14.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1021

Status published

Products (2)

golang/net < 0.55.0

golang.org/x/net/golang.org/x/net/html < 0.55.0

Published May 22, 2026

Tracked Since May 22, 2026