Bug 2483296 (CVE-2026-41150)

Summary: CVE-2026-41150 mermaid: Mermaid: Denial of Service via specially crafted gantt charts
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cdrage, jkoehler, lphiri, rushinde, sdawley
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Mermaid, a JavaScript tool used for creating diagrams and charts. This vulnerability allows a remote attacker to trigger a denial-of-service (DoS) condition. The attack occurs when a specially crafted gantt chart, which uses the `excludes` attribute to exclude all dates, is rendered. Successful exploitation can make the application unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2486497, 2486498, 2486499, 2486500, 2486501, 2486502, 2486503, 2486504, 2486505, 2486490, 2486491, 2486492, 2486493, 2486494, 2486495, 2486496    
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Description OSIDB Bzimport 2026-05-29 15:01:34 UTC 
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.6 and 11.15.0, there is a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates. mermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram). This vulnerability is fixed in 10.9.6 and 11.15.0.