Is marko affected by CVE-2026-41591?

npm marko is affected in <5.38.36.

Is CVE-2026-41591 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-41591

Q: Is CVE-2026-41591 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

npm · marko • npm · @marko/runtime-tags

Summary

Marko: XSS via case-insensitive script/style closing tag bypass in runtime HTML escaping

Severity: medium
EPSS: 0.2% (p9)
Also known as: GHSA-x9fj-57fh-c8wq#@marko/runtime-tags, GHSA-x9fj-57fh-c8wq#marko
Published: 2026-04-22

References

https://github.com/marko-js/marko/security/advisories/GHSA-x9fj-57fh-c8wq
https://nvd.nist.gov/vuln/detail/CVE-2026-41591
https://github.com/marko-js/marko

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.