CVE-2026-41591

medium

Published 2026-05-08 · Modified 2026-05-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.4

Description

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

Predictions

Exploit likelihood

74%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
npm	marko	`<5.38.36`	`5.38.36`
npm	@marko/runtime-tags	`<6.0.164`	`6.0.164`
NPM	@marko/runtime-tags	`< 6.0.164`	`6.0.164`
NPM	marko	`< 5.38.36`	`5.38.36`

References

CWEs

CWE-79

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.