CVE-2026-5160

Versions of the package github.com/yuin/goldmark/renderer/html before 1.7.17 are vulnerable to Cross-site Scripting (XSS) due to improper ordering of URL validation and normalization. The renderer validates link destinations using a prefix-based check (IsDangerousURL) before resolving HTML entities. This allows an attacker to bypass protocol filtering by encoding dangerous schemes using HTML5 named character references. For example, a payload such as javascript&colon;alert(1) is not recognized as dangerous during validation, leading to arbitrary script execution in the context of applications that render the URL.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/yuin/goldmark/commit/cb46bbc4eca29d55aa9721e04ad207c23ccc44f9	Patch
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMYUINGOLDMARKRENDERERHTML-15838406	Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yuin:goldmark:*:*:*:*:*:*:*:*

History

23 Apr 2026, 17:00

Type	Values Removed	Values Added
First Time		Yuin Yuin goldmark
References	~~() https://github.com/yuin/goldmark/commit/cb46bbc4eca29d55aa9721e04ad207c23ccc44f9 -~~	() https://github.com/yuin/goldmark/commit/cb46bbc4eca29d55aa9721e04ad207c23ccc44f9 - Patch
References	~~() https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMYUINGOLDMARKRENDERERHTML-15838406 -~~	() https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMYUINGOLDMARKRENDERERHTML-15838406 - Mitigation, Third Party Advisory
CPE		cpe:2.3:a:yuin:goldmark::::::::

15 Apr 2026, 06:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-15 06:16

Updated : 2026-04-23 17:00

NVD link : CVE-2026-5160

Mitre link : CVE-2026-5160

CVE.ORG link : CVE-2026-5160

JSON object : View

Products Affected

yuin

goldmark

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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