CVE-2025-47911 — Uncontrolled Resource Consumption in X NET Golang.org X NET Html

CWE-400 — Uncontrolled Resource ConsumptionCWE-407 — Inefficient Algorithmic Complexity13 documents9 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 96.09%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Golang.org X NET Golang.org X NET HtmlGolang.org X NETGolang.org X NET Html+1 more
Timeline
PublishedFeb 5
Latest updateApr 7

Description

The html.Parse function in golang.org/x/net/html has quadratic parsing complexity when processing certain inputs, which can lead to denial of service (DoS) if an attacker provides specially crafted HTML content.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LExploitability: 3.9 | Impact: 1.4

Affected Packages4 packages

▶NVDgo/html< 0.45.0
▶Gogolang.org/x_net< 0.45.0

Patches

Patch: go.dev ↗

🔴Vulnerability Details

5
OSV
golang.org/x/net/html has a Quadratic Parsing Complexity issue↗2026-02-12
▶
GHSA
golang.org/x/net/html has a Quadratic Parsing Complexity issue↗2026-02-12
▶
OSV
CVE-2025-47911: The html↗2026-02-05
▶
OSV
Quadratic parsing complexity in golang.org/x/net/html↗2026-02-05
▶
CVEList
Quadratic parsing complexity in golang.org/x/net/html↗2026-02-05
▶

📋Vendor Advisories

5
Ubuntu
ADSys, Juju Core, LXD vulnerabilities↗2026-04-07
▶
Ubuntu
Go Networking vulnerabilities↗2026-03-31
▶
Ubuntu
Go Networking vulnerabilities↗2026-03-12
▶
Red Hat
golang.org/x/net/html: Quadratic parsing complexity in golang.org/x/net/html↗2026-02-05
▶
Debian
CVE-2025-47911: golang-golang-x-net - The html.Parse function in golang.org/x/net/html has quadratic parsing complexit...↗2025
▶

🕵️Threat Intelligence

1
Wiz
CVE-2025-47911 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶

💬Community

1
Bugzilla
CVE-2025-47911 golang.org/x/net/html: Quadratic parsing complexity in golang.org/x/net/html↗2026-02-05
▶
CVE-2025-47911 — Uncontrolled Resource Consumption | cvebase