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Html CVE-2025-47911

MEDIUM
2026-02-05 security@golang.org GHSA-w4gw-w5jq-g9jh
Denial Of Service Golang Red Hat Go Html Suse
5.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Impact

CVSS 5.3 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to denial of service (DoS) if an attacker provides specially crafted HTML content.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Html contains a vulnerability that allows attackers to denial of service (DoS) if an attacker provides specially crafted HTML content (CVSS 5.3).

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

Affected Packages

go golang.org/x/net fix: 0.45.0
go golang.org/x/net/html fix: 0.45.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in go

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

affects Html. 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.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SUSE MEDIUM
Red Hat 5.3 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Patch released
Feb 18, 2026 - 17:48 nvd
Patch available
CVE Published
Feb 05, 2026 - 18:16 nvd
MEDIUM 5.3

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

CVE-2025-47911 presents moderate security risk rated CVSS 5.3. Exploitation could compromise the security of affected deployments. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 97% exploitable
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Low

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:go:html:*:*:*:*:*:go:*:*

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Same technique Denial Of Service

View all
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9.8
CVE-2011-2462 CRITICAL POC
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CVE-2011-0611 HIGH POC
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CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
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CVE-2011-0609 HIGH POC
7.8

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
Container suse/manager/4.3/proxy-httpd:4.3.16.2.9.73.1 Affected
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.119 Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.86 Affected
Container suse/sl-micro/6.0/kvm-os-container:2.1.3-6.106 Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.120 Affected
Container suse/sl-micro/6.0/toolbox:13.2-9.1 Affected

References

Advisories & patches
PATCH https://go.dev/cl/709876 ADVISORY https://pkg.go.dev/vuln/GO-2026-4440 ADVISORY https://ubuntu.com/security/notices/USN-8089-1 ADVISORY https://vuldb.com/vuln/344555 ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21043/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21221/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4190/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4444/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4446/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4479/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4482/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0028/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0403/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0580/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20089/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20176/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20244/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20357/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20685/ REF https://github.com/golang/vulndb/issues/4440 REF https://groups.google.com/g/golang-announce/c/jnQcOYpiR2c

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