CVE-2026-126569

MediumCVSS 5.4/10Last modified Nov 12, 2026

Description

Mbin 1.2.1 before 1.11.1 contains a stored cross-site scripting vulnerability in EmbedElement::buildDestructed() that renders nested Markdown image alt text and URL without HTML escaping. Authenticated users can embed HTML in the alt text of an image inside a link in entries, comments, posts, messages, or bios to run script in viewers' browsers.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
MbinOrg	mbin	>= 1.2.1, < 1.11.1

References

Timeline

Published: Nov 11, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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