Apify Actors MCP Server before 0.9.12 Server-Side Request Forgery via get-html-skeleton
Published Aug 27, 2026
8.7
HIGHCVSS 4.0
EPSS 0.52%
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.
Affected products
-
- Version 0StatusaffectedConstraints<0.9.12
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apify | Actors-Mcp-Server | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Aug 27, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.52% (0.00524) | 42.45th | v5 (v2026.06.15) |
| Aug 28, 2026 | 0.48% (0.00476) | 39.08th | v5 (v2026.06.15) |
References (4)
- https://github.com/apify/apify-mcp-server product
- https://github.com/apify/apify-mcp-server/pull/572 issue-trackingpatch
- https://github.com/apify/apify-mcp-server/security/advisories/GHSA-m28f-9v8h-gg2f vendor-advisory
- https://www.vulncheck.com/advisories/apify-actors-mcp-server-before-0.9.12-server-side-request-forgery-via-get-html-skeleton third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/apify/apify-mcp-server | product | |
| https://github.com/apify/apify-mcp-server/pull/572 | issue-trackingpatch | |
| https://github.com/apify/apify-mcp-server/security/advisories/GHSA-m28f-9v8h-gg2f | vendor-advisory | |
| https://www.vulncheck.com/advisories/apify-actors-mcp-server-before-0.9.12-server-side-request-forgery-via-get-html-skeleton | third-party-advisory |
Change history (0)
No recorded changes yet.