NPM: Mermaid configuration APIs allow prototype pollution

NPM: Mermaid configuration APIs allow prototype pollution vulnerability discovered by ? in WordPress Npm mermaid versions 10.9.8...

GHSA-C4C3-PG64-4M4V Mermaid configuration APIs allow prototype pollution

Summary Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge the caller-supplied configuration object into Mermaid's internal config using the assignWithDepth deep-merge helper that is vulnerable to prototype pollution. Because these APIs...

CVE-2026-71438

Mermaid (JavaScript) prior to versions 10.9.8 and 11.16.1 is vulnerable to prototype pollution via its configuration entry points mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig, which merge caller-supplied data into internal config using the assignWithDepth deep-merge h...

@142vip/vitepress (>=0.0.1-alpha.23, <=0.0.1-alpha.35), @142vip/vuepress (>=0.0.1-alpha.19, <=0.0.1-alpha.25) +225 more potentially affected by CVE-2026-71438 via mermaid (>=11.0.0, <=11.16.0)

mermaid NPM version =11.0.0, =0.0.1-alpha.23, =0.0.1-alpha.19, =0.0.0, =1.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.0.2, =0.0.3, =0.7.9, =0.35.0, =0.2.0, =1.0.1 and more Source cves: CVE-2026-71438 Source advisory: MEND:CVE-2026-71438...

@0xgg/echomd (>=1.0.0, <=1.0.4), @7nohe/vite-plugin-vue-marked (0.2.1) +949 more potentially affected by CVE-2026-71438 via mermaid (>=0.2.16, <=10.9.5)

mermaid NPM version =0.2.16, =1.0.0, =0.18.0-beta.0, =0.3.0, =0.1.0, =0.1.0-a0, =0.17.0-alkemio-1, =0.4.0, =0.0.18, =1.0.0, =3.130.1, =1.19.0, =1.50.0 and more Source cves: CVE-2026-71438 Source advisory: MEND:CVE-2026-71438...

CVE-2026-71438 Mermaid configuration APIs allow prototype pollution

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

CVE-2026-71438

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

EUVD-2026-54244

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

CVE-2026-71438 Mermaid configuration APIs allow prototype pollution

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

CVE-2026-71438 Mermaid configuration APIs allow prototype pollution

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

CVE-2026-71438

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

Arbitrary Code Injection

Overview org.webjars.npm:mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown. Affected versions of this package are vulnerable to Arbitrary Code Injection via the CSS namespacing process. An attacker can manipulate the appearance or behavior of...

Arbitrary Code Injection

Overview mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown. Affected versions of this package are vulnerable to Arbitrary Code Injection via the CSS namespacing process. An attacker can manipulate the appearance or behavior of adjacent DOM...

NPM: Mermaid allows CSS injection applying to sibling elements of the diagram

NPM: Mermaid allows CSS injection applying to sibling elements of the diagram vulnerability discovered by ? in WordPress Npm mermaid versions 10.9.8...

@8btc/excalidraw (>=0.18.0-beta.0, <=0.18.0-beta.4), @airmix/mcp-excalidraw-server (1.0.6) +244 more potentially affected by CVE-2026-41159 +1 more via mermaid (>=10.0.0, <=10.9.5)

mermaid NPM version =10.0.0, =0.18.0-beta.0, =0.17.0-alkemio-1, =1.0.0, =0.18.3, =0.18.0-1, =0.0.1-BETA, =0.18.1, =1.1.4, =0.17.1, =0.0.19, =0.0.1, =0.0.1, =3.0.0, =8.0.1 and more Source cves: CVE-2026-41159, CVE-2026-50159 Source advisory: OSV:GHSA-6X64-9X62-F2GX...

@8btc/excalidraw (>=0.18.0-beta.0, <=0.18.0-beta.4), @airmix/mcp-excalidraw-server (1.0.6) +244 more potentially affected by CVE-2026-50159 via mermaid (>=10.0.0, <=10.9.5)

mermaid NPM version =10.0.0, =0.18.0-beta.0, =0.17.0-alkemio-1, =1.0.0, =0.18.3, =0.18.0-1, =0.0.1-BETA, =0.18.1, =1.1.4, =0.17.1, =0.0.19, =0.0.1, =0.0.1, =3.0.0, =8.0.1 and more Source cves: CVE-2026-50159 Source advisory: SNYK:JS-MERMAID-18592305...

@142vip/vitepress (>=0.0.1-alpha.23, <=0.0.1-alpha.35), @142vip/vuepress (>=0.0.1-alpha.19, <=0.0.1-alpha.25) +225 more potentially affected by CVE-2026-41159 +1 more via mermaid (>=11.0.0, <=11.16.0)

mermaid NPM version =11.0.0, =0.0.1-alpha.23, =0.0.1-alpha.19, =0.0.0, =1.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.0.2, =0.0.3, =0.7.9, =0.35.0, =0.2.0, =1.0.1 and more Source cves: CVE-2026-41159, CVE-2026-50159 Source advisory: GHSA-6X64-9X62-F2GX...

@142vip/vitepress (>=0.0.1-alpha.23, <=0.0.1-alpha.35), @142vip/vuepress (>=0.0.1-alpha.19, <=0.0.1-alpha.25) +225 more potentially affected by CVE-2026-50159 via mermaid (>=11.0.0, <=11.16.0)

mermaid NPM version =11.0.0, =0.0.1-alpha.23, =0.0.1-alpha.19, =0.0.0, =1.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.0.2, =0.0.3, =0.7.9, =0.35.0, =0.2.0, =1.0.1 and more Source cves: CVE-2026-50159 Source advisory: SNYK:JS-MERMAID-18592305...

GHSA-6X64-9X62-F2GX Mermaid allows CSS injection applying to sibling elements of the diagram

Summary Mermaid does not fully restrict CSS to the rendered SVG subtree. Although selectors are prefixed with mermaid-X, sibling and + combinators can still escape the Mermaid container and inject styles to DOM elements adjacent to the diagram . Most users of mermaid would not be affected by this...

@142vip/vitepress (>=0.0.1-alpha.23, <=0.0.1-alpha.35), @142vip/vuepress (>=0.0.1-alpha.19, <=0.0.1-alpha.25) +225 more potentially affected by CVE-2026-41159 +1 more via mermaid (>=11.0.0, <=11.16.0)

mermaid NPM version =11.0.0, =0.0.1-alpha.23, =0.0.1-alpha.19, =0.0.0, =1.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.1.0, =2.0.2, =0.0.3, =0.7.9, =0.35.0, =0.2.0, =1.0.1 and more Source cves: CVE-2026-41159, CVE-2026-50159 Source advisory: OSV:GHSA-6X64-9X62-F2GX...