CVE-2026-26226Published

beautiful-mermaid < 0.1.3 SVG Attribute Injection

Exact source revision recorded 8 Nov 2026 16:11:25 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-26226

Published

beautiful-mermaid versions prior to 0.1.3 contain an SVG attribute injection issue that can lead to cross-site scripting (XSS) when rendering attacker-controlled Mermaid diagrams. User-controlled values from Mermaid style and classDef directives are interpolated into SVG attribute values without proper escaping, allowing crafted input to break out of an attribute context and inject arbitrary SVG elements/attributes into the rendered output. When the generated SVG is embedded in a web page, this can result in script execution in the context of the embedding origin.

Source published: 13 Feb 2026 16:35:06 UTC
Source modified: 8 Nov 2026 14:01:33 UTC
Observed here: 8 Nov 2026 16:11:25 UTC
Source terms: CVE Program Terms of Use

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N