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Δ / VULNERABILITY RECORD

CVE-2026-5160.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 6.1No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Sep 24, 2026

Disclosure summary

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.

Source-reported weakness categories

CWE-79

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Apr

Open original source · Updated Sep 24, 2026

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.

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 6.1

VendorProduct / associationVersion / bounds
Microsoft update guidecbl2 gh 2.13.0-26 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 telegraf 1.31.0-17 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 gh 2.62.0-15 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 telegraf 1.31.0-19 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 telegraf 1.29.4-22 on CBL-Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 gh 2.62.0-13 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 telegraf 1.29.4-22 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 gh 2.13.0-26 on CBL-Mariner 2.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 1.31.0-19 · product IDs 21127-17084, 21258-17084
  • Vendor guidance · product IDs 21127-17084, 21258-17084
  • CBL-Mariner Releases · build 2.62.0-15 · product IDs 21278-17084, 20997-17084
  • Vendor guidance · product IDs 21278-17084, 20997-17084
  • Release Notes · product IDs 21126-21692, 21224-21692
  • Vendor guidance · product IDs 21126-21692, 21224-21692

Original records & references

PUBLISHED 2026-04-18T21:01:39-04:00
MODIFIED 2026-09-24T21:53:12-04:00
INGESTED 2026-10-08T12:45:03-04:00