Medium 6.5Published May 22, 2026

CVE-2026-25680Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

Updated under an hour ago (Oct 26, 2026, 5:00 AM ET)

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It affects golang.org/x/net/html and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for golang.org/x/net/html

Exploited in the last 30 days

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

CVSS: 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-407
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Go
NVD analysis: Analyzed
Record last updated: May 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

golang.org/x/net golang.org/x/net/html golang.org_x_net:html (from the name)	before 0.55.0	CNA record
golang net golang:net	before 0.55.0	NVD

References

https://go.dev/cl/781702issue-tracking
https://go.dev/issue/79573issue-tracking
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8mailing-list
https://pkg.go.dev/vuln/GO-2026-5028vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.