Apify Actors MCP Server before 0.9.12 Server-Side Request Forgery via get-html-skeleton (CVE-2026-81093) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-81093

Apify Actors MCP Server before 0.9.12 Server-Side Request Forgery via get-html-skeleton

Answer in brief

CVE-2026-81093 records a Unknown severity vulnerability in Apify Actors MCP Server before 0.9.12 Server-Side Request Forgery via get-html-skeleton. The current sources do not mark it as known exploited. The current feed maps apify/actors-mcp-server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Aug 27, 2026Source checked Aug 27, 2026First seen by HOL Aug 27, 2026Material review Aug 27, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps apify/actors-mcp-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
apify/actors-mcp-servergeneric	>=0 <0.9.12	0.9.12

Recommended response

Check inventory. Check lockfiles and deployed manifests for apify/actors-mcp-server.
Review the reported fix. Update apify/actors-mcp-server to 0.9.12 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 27, 2026

Sources and claim methodology

Upstream source description

The get-html-skeleton tool fetched a URL the caller supplied after checking only its syntax. The handler in src/tools/common/get_html_skeleton.ts validated the url argument with isValidHttpUrl from src/utils/generic.ts, which confirmed the string began with an http or https scheme and parsed as a URL and inspected neither the host name nor the address it resolves to. Loopback, link-local and private ranges therefore passed, including the address cloud providers use to serve instance metadata. The unchecked URL was handed to the web-browser actor and the fetched document was returned in the tool response, so any caller of the MCP server could make it request an endpoint reachable only from the host and read the result, including instance credentials. Version 0.9.12 removes the tool.

Quoted source text, attributed separately from HOL analysis.