CVE-2026-5160
Goldmark Renderer HTML Cross-site Scripting (XSS)
Description
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:alert(1) is not recognized as dangerous during validation, leading to arbitrary script execution in the context of applications that render the URL.
INFO
Published Date :
April 15, 2026, 5 a.m.
Last Modified :
April 15, 2026, 5 a.m.
Remotely Exploit :
No
Source :
snyk
Affected Products
The following products are affected by CVE-2026-5160
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the goldmark HTML renderer package to 1.7.17 or later.
- Ensure URL validation happens after normalization.
- Validate all user-supplied URLs strictly.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-5160 vulnerability anywhere in the article.