CVE-2026-5323Public exploit

Local SSRF via unvalidated Puppeteer navigation

Published Apr 2, 2026 · Updated Apr 2, 2026

Server-side request forgery in Priyankar Kumar A11y MCP Server 1.0.0 through 1.0.5 allows local users to reach internal HTTP services. The audit_webpage and get_summary handlers pass their URL argument directly to Puppeteer's page.goto() without validating the scheme or destination. Reachability requires invoking the local stdio MCP tool, directly or through an approved LLM action, and permits requests to loopback, private, link-local, or metadata endpoints.

CVSS severity5.3
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Server-side request forgery in Priyankar Kumar A11y MCP Server 1.0.0 through 1.0.5 allows local users to reach internal HTTP services. The audit_webpage and get_summary handlers pass their URL argument directly to Puppeteer's page.goto() without validating the scheme or destination. Reachability requires invoking the local stdio MCP tool, directly or through an approved LLM action, and permits requests to loopback, private, link-local, or metadata endpoints.

The record

CVE
CVE-2026-5323
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Priyankar Kumar
Product
A11y MCP Server
Classifications
CWE-918
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0
  2. Affected versionversion=1.0.1
  3. Affected versionversion=1.0.2
  4. Affected versionversion=1.0.3
  5. Affected versionversion=1.0.4
  6. Affected versionversion=1.0.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Priyankar Kumar · A11y MCP Serverversion=1.0.0; version=1.0.1; version=1.0.2; version=1.0.3; version=1.0.4; version=1.0.5

Published CVSS scores

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
1.9VulDBCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo