CVE-2026-5160: Versions of the package github.com/yuin/goldmark/renderer/html before 1.7.17 are vulnerable to Cross-site Scri

Q: How do I fix CVE-2026-5160?

goldmark: upgrade to 1.7.17. Exact commands for each OS are on this page.

Q: Is CVE-2026-5160 being exploited?

CVE-2026-5160 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5160 affect?

CVE-2026-5160 affects goldmark. Severity is medium (CVSS 6.1). 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-

Q: How urgent is CVE-2026-5160?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-5160 is a medium-severity flaw (CVSS 6.1) affecting goldmark. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 suc

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-15
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: yuin

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-15 06:16 UTCPublished CVE record published
2026-06-17 10:58 UTCUpdated Record last modified

yuin goldmark UPGRADE

Affected: < 1.7.17

Fixed in: 1.7.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy goldmark || rpm -q goldmark || goldmark --version

2. UPGRADE to 1.7.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade goldmark

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade goldmark

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5160?

goldmark: upgrade to 1.7.17. Exact commands for each OS are on this page.

Is CVE-2026-5160 being exploited?

CVE-2026-5160 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5160 affect?

CVE-2026-5160 affects goldmark. Severity is medium (CVSS 6.1). 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-

How urgent is CVE-2026-5160?

Priority 27/100. No elevated risk signals yet.

Software pages

GitHub vulnerabilities

References

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