| Affected_by_vulnerabilities |
| 0 |
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| 1 |
| url |
VCID-bu1t-mfhx-1yet |
| vulnerability_id |
VCID-bu1t-mfhx-1yet |
| summary |
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. |
| references |
| 0 |
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| 1 |
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| 2 |
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| 3 |
| reference_url |
https://github.com/mermaid-js/mermaid |
| reference_id |
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| reference_type |
|
| scores |
| 0 |
| value |
5.3 |
| scoring_system |
cvssv3.1 |
| scoring_elements |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
|
| 1 |
| value |
5.3 |
| scoring_system |
cvssv4 |
| scoring_elements |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L |
|
| 2 |
| value |
MODERATE |
| scoring_system |
generic_textual |
| scoring_elements |
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|
| url |
https://github.com/mermaid-js/mermaid |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| fixed_packages |
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| aliases |
CVE-2026-41150, GHSA-6m6c-36f7-fhxh
|
| risk_score |
3.1 |
| exploitability |
0.5 |
| weighted_severity |
6.2 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-bu1t-mfhx-1yet |
|
| 2 |
| url |
VCID-j4ej-bzys-3fag |
| vulnerability_id |
VCID-j4ej-bzys-3fag |
| summary |
Prototype pollution vulnerability found in Mermaid's bundled version of DOMPurify
The following bundled files within the Mermaid NPM package contain a bundled version of DOMPurify that is vulnerable to https://github.com/cure53/DOMPurify/security/advisories/GHSA-mmhx-hmjr-r674, potentially resulting in an XSS attack.
This affects the built:
- `dist/mermaid.min.js`
- `dist/mermaid.js`
- `dist/mermaid.esm.mjs`
- `dist/mermaid.esm.min.mjs`
This will also affect users that use the above files via a CDN link, e.g. `https://cdn.jsdelivr.net/npm/mermaid@10.9.2/dist/mermaid.min.js`
**Users that use the default NPM export of `mermaid`, e.g. `import mermaid from 'mermaid'`, or the `dist/mermaid.core.mjs` file, do not use this bundled version of DOMPurify, and can easily update using their package manager with something like `npm audit fix`.**
### Patches
- `develop` branch: 6c785c93166c151d27d328ddf68a13d9d65adc00
- backport to v10: 92a07ffe40aab2769dd1c3431b4eb5beac282b34 |
| references |
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| fixed_packages |
|
| aliases |
GHSA-m4gq-x24j-jpmf
|
| risk_score |
4.0 |
| exploitability |
0.5 |
| weighted_severity |
8.0 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-j4ej-bzys-3fag |
|
| 3 |
| url |
VCID-qcuu-a2xn-9bhv |
| vulnerability_id |
VCID-qcuu-a2xn-9bhv |
| summary |
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and prior, in addition to 11.0.0-alpha.1 through 11.12.0 are vulnerable to CSS injection through improper sanitization. The state diagram (and any other diagram type that routes user-controlled style strings through the createCssStyles parser) captures classDef values using an unrestricted regex that matches everything up to a newline. That value then flows unsanitized through addStyleClass() into createCssStyles() and is assigned to style.innerHTML, so a closing brace (}) in the value terminates the generated CSS selector and turns everything after it into a new CSS rule on the page. This enables page defacement, user tracking via url() callbacks, and DOM attribute exfiltration. This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed <iframe>. |
| references |
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| fixed_packages |
|
| aliases |
CVE-2026-41148, GHSA-xcj9-5m2h-648r
|
| risk_score |
3.1 |
| exploitability |
0.5 |
| weighted_severity |
6.2 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-qcuu-a2xn-9bhv |
|
| 4 |
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| 5 |
| url |
VCID-thcv-t41j-hqct |
| vulnerability_id |
VCID-thcv-t41j-hqct |
| summary |
Mermaid is a JavaScript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. An attacker is able to inject arbitrary `CSS` into the generated graph allowing them to change the styling of elements outside of the generated graph, and potentially exfiltrate sensitive information by using specially crafted `CSS` selectors. The following example shows how an attacker can exfiltrate the contents of an input field by bruteforcing the `value` attribute one character at a time. Whenever there is an actual match, an `http` request will be made by the browser in order to "load" a background image that will let an attacker know what's the value of the character. This issue may lead to `Information Disclosure` via CSS selectors and functions able to generate HTTP requests. This also allows an attacker to change the document in ways which may lead a user to perform unintended actions, such as clicking on a link, etc. This issue has been resolved in version 9.1.3. Users are advised to upgrade. Users unable to upgrade should ensure that user input is adequately escaped before embedding it in CSS blocks. |
| references |
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| fixed_packages |
|
| aliases |
CVE-2022-31108, GHSA-x3vm-38hw-55wf
|
| risk_score |
3.1 |
| exploitability |
0.5 |
| weighted_severity |
6.2 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-thcv-t41j-hqct |
|
| 6 |
| url |
VCID-trvn-qh5r-bffg |
| vulnerability_id |
VCID-trvn-qh5r-bffg |
| summary |
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits DOM injection that escapes the SVG context. However, <script> tags are stripped, which prevents cross-site scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed <iframe>. |
| references |
|
| fixed_packages |
|
| aliases |
CVE-2026-41149, GHSA-ghcm-xqfw-q4vr
|
| risk_score |
3.1 |
| exploitability |
0.5 |
| weighted_severity |
6.2 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-trvn-qh5r-bffg |
|
| 7 |
| url |
VCID-v3d4-gbq4-rubq |
| vulnerability_id |
VCID-v3d4-gbq4-rubq |
| summary |
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, Mermaid's default configuration allows injecting CSS that applies outside of the Mermaid diagram via the fontFamily, themeCSS, and altFontFamily configuration options. The injected CSS exploits stylis's & (scope reference) handling. :not(&) escapes the #mermaid-xxx automatic scoping, applying styles to all page elements. Global at-rules (@font-face, @keyframes, @counter-style) are also injectable as stylis hoists them to top level. This allows page defacement and DOM attribute exfiltration via CSS :has() selectors. This vulnerability is fixed in 10.9.6 and 11.15.0. |
| references |
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| fixed_packages |
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| aliases |
CVE-2026-41159, GHSA-87f9-hvmw-gh4p
|
| risk_score |
3.1 |
| exploitability |
0.5 |
| weighted_severity |
6.2 |
| resource_url |
http://public2.vulnerablecode.io/vulnerabilities/VCID-v3d4-gbq4-rubq |
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