How serious is CVE-2026-26226?

This vulnerability has a CVSS score of 5.3 out of 10, classified as MEDIUM severity. No public exploit code has been identified yet.

Which products are affected by CVE-2026-26226?

Check the official CVE details for a complete list of affected products and versions.

How do I fix CVE-2026-26226?

To remediate CVE-2026-26226, check for security patches from the vendor. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-26226

Medium

|5.3

No Exploit

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to inject malicious scripts into web pages by manipulating SVG diagrams created with the affected software. It occurs when user-defined styles and classes are not properly secured, enabling the attacker to execute harmful code if the diagrams are rendered in a web application.

Technical 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 Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

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

Exploit Resources

Search for proof-of-concept code and exploit modules

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Official References

NIST NVD

Est. Bounty

$724($500-$1K)

Vendor Response

Grade APatched in 0 days

Quick Information

Published

Feb 13, 2026

7 days ago

Last Modified

Feb 13, 2026

7 days ago