CVE-2026-81093

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-27. the CNA's CVSS baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 4 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.6
EG Score
8.6(high)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 29, 2026

Advisory Details (3)

Auto-updated Aug 27, 2026
Patch available. Sources: github_pr.
generic

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

https://www.vulncheck.com/advisories/apify-actors-mcp-server-before-0.9.12-server-side-request-forgery-via-get-html-skeleton
github_pr Patch Available

fix: Drop Node.js requirement from 22 to 18 and remove cheerio dependency

Patch available: apify/apify-mcp-server v0.10.1 (PR #572 merged 2026-03-19)

https://github.com/apify/apify-mcp-server/pull/572
generic

GitHub - apify/apify-mcp-server: The Apify MCP server enables your AI agents to extract data from social media, search engines, maps, e-commerce sites, or any other website using thousands of ready-made scrapers, crawlers, and automation tools available on the Apify Store. · GitHub

https://github.com/apify/apify-mcp-server

Vendor Advisories for CVE-2026-81093(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 22:53 UTCGHSA enrichment
  3. 2026-08-29 11:59 UTCEG score recompute
  4. 2026-08-29 11:59 UTCGHSA enrichment
  5. 2026-08-29 05:17 UTCEG score recompute
  6. 2026-08-29 05:17 UTCGHSA enrichment
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-28 18:19 UTCGHSA enrichment
  9. 2026-08-28 07:21 UTCGHSA enrichment
  10. 2026-08-27 20:27 UTCEG score recompute
  11. 2026-08-27 20:27 UTCGHSA enrichment
  12. 2026-08-27 20:18 UTCEG score recompute
  13. 2026-08-27 20:18 UTCGHSA enrichment
  14. 2026-08-27 17:27 UTCEG score recompute
  15. 2026-08-27 16:47 UTCEG score recompute
  16. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-81093?
CVE-2026-81093 is a high vulnerability published on August 27, 2026. The get-html-skeleton tool fetched a URL the caller supplied after checking only its syntax. The handler in src/tools/common/gethtmlskeleton.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…
When was CVE-2026-81093 disclosed?
CVE-2026-81093 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81093 actively exploited?
CVE-2026-81093 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.9% of all scored CVEs.
What is the CVSS score of CVE-2026-81093?
CVE-2026-81093 has a CVSS v4.0 base score of 8.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-81093?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81093, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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