a11y-mcp: Server-Side Request Forgery (SSRF) vulnerability in A11yServer function
A vulnerability was found in priyankark a11y-mcp up to 1.0.5. This vulnerability affects the function A11yServer of the file src/index.js. The manipulation results in server-side request forgery. The attack must be initiated from a local position. The exploit has been made public and could be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases.
Upgrading to version 1.0.6 is able to resolve this issue. The patch is identified as e3e11c9e8482bd06b82fd9fced67be4856f0dffc. It is recommended to upgrade the affected component. The vendor acknowledged the issue but provides additional context for the CVSS rating: "a11y-mcp is a local stdio MCP server - it has no HTTP endpoint and is not network-accessible. The caller is always the local user or an LLM acting on their behalf with user approval."
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | a11y-mcp | < 1.0.5 | 1.0.5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-5323
- https://github.com/wing3e/public_exp/issues/17
- https://github.com/priyankark/a11y-mcp/commit/e3e11c9e8482bd06b82fd9fced67be4856f0dffc
- https://github.com/priyankark/a11y-mcp
- https://vuldb.com/submit/780752
- https://vuldb.com/vuln/354655
- https://vuldb.com/vuln/354655/cti
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-918- Platform
- npm
- Package
a11y-mcp- Disclosed
- 02.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-prmx-7v35-7q82 - CC BY 4.0
Vulnerability history: a11y-mcp
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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