CVE-2026-65056

HIGHPre-NVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: Elevated riskExposed: 0

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

mcp-webresearch 0.1.7 contains a server-side request forgery vulnerability that allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool, which only validates the URL protocol without filtering private or reserved IP ranges. Attackers can steer the LLM-controlled URL argument through prompt injection to navigate the server's Playwright browser to internal endpoints such as cloud instance metadata services, causing the server to return sensitive internal page content including credentials into the model context.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
53(Track)
EG Risk 53/100SSVC: 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
Severity82% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

mcp-webresearch Server-Side Request Forgery in visit_page Due to Missing Internal-IP Filtering | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mcp-webresearch-server-side-request-forgery-in-visit-page-due-to-missing-internal-ip-filtering
generic

oss/mcp-webresearch.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md

Vendor Advisories for CVE-2026-65056(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 21× in last 7d / 21× 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. 2026-07-27 02:06 UTCGHSA enrichment
  2. 2026-07-26 15:12 UTCEG score recompute
  3. 2026-07-26 15:12 UTCGHSA enrichment
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 04:18 UTCEG score recompute
  7. 2026-07-26 04:18 UTCGHSA enrichment
  8. 2026-07-25 14:18 UTCEPSS rescore
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-24 14:18 UTCEPSS rescore
  11. 2026-07-24 14:18 UTCEPSS rescore
  12. 2026-07-23 14:18 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 03:22 UTCEG score recompute
  15. 2026-07-22 22:57 UTCEG score recompute
  16. 2026-07-22 22:57 UTCGHSA enrichment
  17. 2026-07-22 14:08 UTCEPSS rescore
  18. 2026-07-22 14:08 UTCEPSS rescore
  19. 2026-07-21 21:22 UTCEG score recompute
  20. 2026-07-21 21:10 UTCEG score recompute
  21. 2026-07-21 21:08 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-65056?
CVE-2026-65056 is a high vulnerability published on July 21, 2026. mcp-webresearch 0.1.7 contains a server-side request forgery vulnerability that allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool, which only validates the URL protocol without filtering private or reserved IP…
When was CVE-2026-65056 disclosed?
CVE-2026-65056 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65056 actively exploited?
CVE-2026-65056 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 85.9% of all scored CVEs.
What is the CVSS score of CVE-2026-65056?
CVE-2026-65056 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-65056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65056, 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

Explore the affected products and dependency analysis for CVE-2026-65056

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