Go Net HTML parser is vulnerable to denial of service

MEDIUM 6.5CVE-2026-25680 · GHSA-5cv4-jp36-h3mw · GO-2026-5028 · Published 22/05/2026 · updated 23/07/2026

In short

CVE-2026-25680 is a MEDIUM (CVSS 6.5) vulnerability affecting golang.org/x/net, net (golang).
Chance of exploitation in the next 30 days (EPSS): 0.33%, higher than 25.8% of all vulnerabilities.
Fix: update to 0.55.0 or later.

Package	Affected versions	Patched versions
golang.org/x/net Go	`< 0.55.0`	`0.55.0`
net golang	`< 0.55.0`	`0.55.0`

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.

NVD description

Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

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Package

Affected versions

Patched versions

< 0.55.0

0.55.0

< 0.55.0

0.55.0

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