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6.4mediumMedium

CVE-2026-41591

Openjsf Marko

Marko is a declarative, HTML-based language for building web apps. Prior to marko version 5.38.36 and prior to @marko/runtime-tags 6.0.164, when dynamic text is interpolated into a , , etc. and inject arbitrary HTML/JavaScript, resulting in cross-site scripting. This issue has been patched in marko version 5.38.36 and @marko/runtime-tags 6.0.164.

Exploitation status

  • Published references include exploit or proof-of-concept material. There is no confirmation it is being used in real attacks.
  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, an ordinary user account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
6.4 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness
CWE-79
Assigned by
security-advisories@github.com

Dates

Published
2026-05-08
Last modified
2026-08-26
Sources
NVD

Affected products

  • Openjsf Marko- 5.38.36
  • Openjsf Marko\/Runtime-Tags- 6.0.164

As listed in the NVD configuration data. Not a statement about your estate.

References