CVE-2026-5160

mediumpriority · track · 0EPSS 0.003 · 26 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.34% (26th) EPSS

CVSS 6.1 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-23

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

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–6.1

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · report@snyk.ioexploitability 2.8 · impact 2.7

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · OSV

v4.05.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:Nsecondary · ENISA EU

v4.05.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · report@snyk.io

v4.01.2lowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (4)

Products and version ranges known to be affected.

n/a github.com/yuin/goldmark/renderer/html0 → 1.7.17enisa_euvdEU
yuin goldmark< 1.7.17nvdUScpe:2.3:a:yuin:goldmark:*:*:*:*:*:*:*:*
Go github.com/yuin/goldmark< 1.7.17osvUSpkg:golang/github.com/yuin/goldmark
Go github.com/yuin/goldmark/renderer/html< 1.7.17osvUSpkg:golang/github.com/yuin/goldmark/renderer/html

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-c97m-vxhj-p7j6goldmark vulnerable to Cross-site Scripting (XSS)2026-04-17ghsa · osvUS
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.
GO-2026-5320Cross-site Scripting (XSS) in github.com/yuin/goldmark2026-07-07vendor · osvUS
Cross-site Scripting (XSS) in github.com/yuin/goldmark

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2026-04-15modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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