Answer in brief
CVE-2026-71436 records a Medium severity (CVSS 5.3) vulnerability in Mermaid XY Charts are vulnerable to an infinite loop DoS. The current sources do not mark it as known exploited. The current feed maps mermaid-js/mermaid (generic), mermaid (npm), mermaid (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-71436 records a Medium severity (CVSS 5.3) vulnerability in Mermaid XY Charts are vulnerable to an infinite loop DoS. The current sources do not mark it as known exploited. The current feed maps mermaid-js/mermaid (generic), mermaid (npm), mermaid (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mermaid-js/mermaid (generic), mermaid (npm), mermaid (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mermaid-js/mermaidgeneric | >= 10.6.0, < 10.9.8 || >= 11.0.0-alpha.1, < 11.16.1 | Not reported |
| mermaidnpm | >=10.6.0,<10.9.8 | 10.9.8 |
| mermaidnpm | >=11.0.0-alpha.1,<11.16.1 | 11.16.1 |
Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1.
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mermaid-js/mermaid (generic), mermaid (npm), mermaid (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mermaid-js/mermaidgeneric | >= 10.6.0, < 10.9.8 || >= 11.0.0-alpha.1, < 11.16.1 | Not reported |
| mermaidnpm | >=10.6.0,<10.9.8 | 10.9.8 |
| mermaidnpm | >=11.0.0-alpha.1,<11.16.1 | 11.16.1 |
Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1.
Quoted source text, attributed separately from HOL analysis.