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.

• cbl2 gh 2.13.0-26 on CBL Mariner 2.0

• azl3 telegraf 1.31.0-17 on Azure Linux 3.0

• azl3 gh 2.62.0-15 on Azure Linux 3.0

• azl3 telegraf 1.31.0-19 on Azure Linux 3.0

• cbl2 telegraf 1.29.4-22 on CBL-Mariner 2.0

• azl3 gh 2.62.0-13 on Azure Linux 3.0

• cbl2 telegraf 1.29.4-22 on CBL Mariner 2.0

• cbl2 gh 2.13.0-26 on CBL-Mariner 2.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 8, 2026 at 9:05 AM UTC
   • The vendor changed the advisory title.
   • Added affected products: cbl2 gh 2.13.0-26 on CBL-Mariner 2.0, cbl2 telegraf 1.29.4-22 on CBL-Mariner 2.0.
   • The vendor changed its remediation guidance.

1. Apr 19, 2026 at 1:01 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 25, 2026 at 1:53 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

3. Sep 27, 2026 at 11:11 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

4. Nov 10, 2026 at 2:00 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.