Go Net HTML parser is vulnerable to denial of service
Date: 2026-05
Affected: go/golang.org/x/net
Attack vector: dos
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-25680
CWE: CWE-400
CVSS: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

In Go Net (`golang.org/x/net`) before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.


Mitigations:

Architectural layers (MAESTRO):