CVE-2026-26226

MEDIUM EPSS 39.3%
Published Feb 13, 20264mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Feb 13, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
39.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 4

  • github.com https://github.com/lukilabs/beautiful-mermaid/pull/8
  • github.com https://github.com/lukilabs/beautiful-mermaid/releases/tag/v0.1.3
  • neo.projectdiscovery.io https://neo.projectdiscovery.io/share/cec71dc7-a8eb-417e-b8b4-666644796c1e
  • vulncheck.com https://www.vulncheck.com/advisories/beautiful-mermaid-svg-attribute-injection

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.